vernicosumR. Acid test Gardeners and growers have been tweaking the growing environment for millennia, so making an ericaceous bed to widen our … Getting to know your soil and how you can give your plants a head-start will keep your garden looking its best. It is an acidic compost, and suitable for growing rhododendrons, camellias, azaleas, heathers, and other plants that dislike alkaline soil… Although their requirements are not as extreme as blueberries, for example, they still need acidic soil, with a pH of about 6 or less.But even if you don’t have acidic soil, you can either grow them in the garden and add an acidifier periodically, or you can grow them in containers. Key Potted Rhododendron facts. Whereas many plants can be fed with a general-purpose feed, ericaceous plants really do much better if fed with a specific ericaceous plant feed. Others which have on occasion reportedly shown some tolerance to soil pH levels above pH 6.0, usually regarded as the upper limit of alkaline tolerance of rhododendrons, are: R. augustinii (Electra Group) 'Electra' AGMR. 222879/SC038262. Most rhododendron varieties require soil pH between 5 and 5.5. Ericaceae, the heather family; Calcifuges, all plants which dislike alkaline (chalky) soil - including heathers, rhododendron, and camellia; Ericaceous bed, a bed with acidic soil typically having a pH between 4.5 and 6 used for growing Calcifuges; Ericaceous compost, a commercial formulation of growing medium designed specifically for ericaceous plants in containers 'Praecox' AGMR. The family is large, with c. 4250 known species spread across 124 genera, making it the 14th most species-rich family of flowering plants. What most soils need is air, as Mr. Greer goes on to explain. Soil acidity is important if you want to grow ericaceous (acid-loving) plants such as Pieris, Camellia, or Rhododendron. This also applies to Blueberries. Generally, it is difficult to alter soil pH in the long term. Where soils are naturally alkaline it is both costly and difficult to maintain the pH at artificially low levels. Find many great new & used options and get the best deals for Ericaceous Compost 60 Litre Westlands Azalea Camellia & Rhododendron Plants at the best online prices at eBay! Ericaceous Compost Info. What is ericaceous compost? Plant high in the ground, with the top of the rootball visible. Its patented Smart Fibre™ and Waterlock™ technologies with the availability of all the nutrients, NPK and trace elements, ensures that your ericaceous … The azalea, a member of the Rhododendron family, thrives in an acidic soil that has a pH of 4.5 to 6.0. SITE & SOIL. Furthermore, what plants grow in ericaceous soil? Rhododendrons are nice shrubs perfectly suited to being grown in pots. The plants suitable for an ericaceous garden have always been some of our favourites. Remember to water them using rain water a good reason to get a water butt or two. It is usually only required if soil pH is neutral or alkaline. If your natural soil is perfect rhododendron soil, you can put this article down and take up your shovel and proceed. Ericaceous Shrubs, Autumn Flowering Gentian, Primulas and other plants from the wide range we grow. If you have a heavy clay soil, plant your rhododendron in a mound of improved soil as described below. There are such soils, but most are not so fortunate. If the soil is not sufficiently acid the plants are unable to absorb iron. This is mainly due to the pH of the soil moisture which will gradually raise the pH of the media over time. Frimley, Surrey GU16 7ER,  Ericaceous plants are plants that don’t like growing in soils that contain lime. Sulphur is the most common acidifying material. Gardening with rhododendrons on soils above pH 6. Bulrush Professional Ericaceous compost is a peat-reduced product similar to the compost we grow our plants in. Read on to learn more. Peat is no longer recommended. The term “Ericaceous” refers to a family of plants in the Ericaceae family – heathers and other plants that grow primarily in infertile or acidic growing conditions. Rhododendrons grow best in soils with a pH of 4.5-6.0. and are used under licence from OMS Investments, Inc. Roundup® is a registered trademark and used under license. Continuous release feeds are perfect for those who lack time to feed regularly as they feed for up to 6 months from 1 application. It is generally not available elsewhere and is much better than most ericaceous composts sold in garden centres, which is milled to pieces and has no structure. If it’s slightly acidic, you can grow a huge range of plants. Rhododendrons need acid soil. See RHS Find a Plant for more choice rhododendrons. Ericaceous compost, chopped bracken and pine needles at planting, plus a dressing of sulphur, may also enable rhododendrons to be grown. It is occasionally suggested that some rhododendrons are tolerant of alkaline soils. The term “Ericaceous” refers to a family of plants in the Ericaceae family – heathers and other plants that grow primarily in infertile or acidic growing conditions. Our selection of 10 plants for ericaceous bed. This includes azalea, rhododendron, pieris and most of the flowering broadleaf evergreens. may contribute to the competitive success of Erica-INTRODUCTION ^^^^ ^^^j .^j^^ indicates their importance in the Rhododendron macrophyllum G. Don and Gaultheria nitrogen cj'cle of forest ecosystems. It is acidic and helps hold moisture but it has little structure, no feed and no mulching value. dichroanthum subsp. Ericaceous plants include Rhododendron, Camellia, Azalea, Pieris, summer-flowering heathers (calluna) and even Japanese maples (Acer) among others. The Ericaceae are a family of flowering plants, commonly known as the heath or heather family, found most commonly in acid and infertile growing conditions. However, this rarely works well and is a bit of a risk. This is a condition known as lime-induced chlorosis, where they don’t grow or flower well and usually, finally die. Make a soil-compost-bark-peat etc mix and plant into this. United Kingdom. Free delivery for many products! Soil should be well-drained, humus-rich, moist, and acidic (pH 4.5–6). Miracle-Gro Premium Azalea, Camellia & Rhododendron Ericaceous Compost The perfect home for all your ericaceous plants such as azaleas, camellias and rhododendrons that love acid growing conditions Ideal for beds, borders and baskets – use wherever you need a nutritious home for your ericaceous plants special feeding needs. Ericaceous compost is an acidic compost suited to growing lime-hating plants such as rhododendrons, azaleas, camellias, calluna and various other acid-loving plants. They are also known as ‘acid lovers’ or ‘lime haters’. Key Potted Rhododendron facts. This can either be a granular feed or a liquid feed - whichever you prefer. Autumn is a great time to plant spring and summer-flowering bulbs, which will be well worth the wait. Sustainably sourced in Norfolk as part of a Heathland maintenance programme, this is a rich black ericaceous soil with very high organic content suitable for acid loving plants such as Azalea, Camellia, Gardenia, Heathers, Hydrangea & Rhododendron. Ericaceae, the heather family; Calcifuges, all plants which dislike alkaline (chalky) soil – including heathers, rhododendron and camellia; Ericaceous bed, a bed with acidic soil typically having a pH between 4.5 and 6 used for growing Calcifuges This also applies to Blueberries. The species most usually mentioned, Rhododendron hirsutum, is common on limestone ranges in the Dolomites but this on dolomitic or magnesium limestone rather than calcium limestone, which may explain its apparent tolerance of alkaline conditions. For successful cultivation a minimum depth of 30cm (1ft) of ericaceous compost or soil is needed above a layer of isolating lime free drainage material such as sharp sand. If your soil is alkaline, you could try digging a large hole, lining it with plastic sheeting, making some drainage holes in the plastic, and then filling with a lime-free soil or ericaceous compost. Folk like me, who garden on chalky soil, have to grow them in large pots or tubs of ericaceous (lime-free) compost, but if you garden on acid soil … This means they won’t grow well in soils that have a high pH - such soils are referred to as alkaline. Ericaceous plants include Rhododendron, Camellia, Azalea, Pieris, summer-flowering heathers (calluna) and even Japanese maples (Acer) among others. insigne AGMR. But what is ericaceous compost? Sold in 1 tonne Dumpy Bags. Alternatively, the RHS provides a comprehensive soil analysis service. The main reason for this is that they need plenty of iron and other soil nutrients that become insoluble or ‘locked up’ in the soil at high pH, so the plants can’t absorb them. Ericaceous plants are made up of at least three growth habits including surge growers (e.g., rhododendron, pieris, and mountain … This also applies to Blueberries. A Premium Compost, specially formulated to cater the needs for all ericaceous plants such as azaleas, camellias and rhododendrons that love acid growing conditions. Ericaceous plants, especially rhododendrons and blueberries, also rely on a close symbiotic relationship with myccorhizae in order to adequately acquire nutrients and water from the surrounding soil. Symptoms of iron deficiency are yellow leaves with green veins. These contain all the specific nutrients needed for great green leaves and masses of fabulous flowers. Glendoick Garden Centre Pagoda garden is an example. Ericaceous plants include Rhododendron, Camellia, Azalea, Pieris, summer-flowering heathers (calluna) and even Japanese maples (Acer) among others. If growing rhododendrons in containers, use an ericaceous compost . Ericaceous shrubs require an acid soil. CLAY SOIL. Provender Nurseries are progressive and professional in our approach to supplying the landscape industry with a … But the more acidic the soil, the more limited your choice will be. 70-80cm specimen, dig in 60 litres of ericaceous compost. This cultivar has been used subsequently to develop the Inkarho rootstock. Liquid feeds are more suited to those who love the routine of regular feeding. Ericaceous compost contains mostly peat. Ericaceous may refer to: . Some species and rootstocks may have some tolerance of more alkaline conditions. Nicci discusses ericaceous plants and how to care for them. traillianumR. Rhododendrons are nice shrubs perfectly suited to being grown in pots. Its patented Smart Fibre™ and Waterlock™ technologies with the availability of all the nutrients, NPK and trace elements, ensures that your ericaceous plants will thrive. the RHS today and get 12 months for the price of 9. Rhododendron doesn’t flower. When severe, the leaves are yellow with brown margins. crushed lava rock, no soil • Holden Arboretum mix: five parts coarse sand and one part medium pine bark to four parts loamy soil. Peat is no longer recommended. In gardens with acid soil, it is easy to grow Rhododendrons and Azaleas as they will thrive on ericaceous soil, but they will not grow well in alkaline soil so it is best to check first. Neutral is pH7 and higher than 7 alkaline. Soil acidity is measured according to the pH scale. To find out how to keep ericaceous plants happy, check out our advice on how to garden on acid soil. This includes azalea, rhododendron, pieris and most of the flowering broadleaf evergreens. acidic , acid -based 2004 , John Mason, Nursery Management , →ISBN , … In simple terms, it is compost … The meaning of the word ‘ericaceous’ directly relates to the definition of plants in the Ericaceae family. But what is ericaceous compost? decorum AGMR. oreodoxa var. A full list with tips & tricks for all seasons, Miracle-Gro® All Purpose Soluble Plant Food, Miracle-Gro® All Purpose Continuous Release Plant Food, Roundup® for Lawn Optima Concentrate Weedkiller, Miracle-Gro® EverGreen® Water Soluble Lawn Food, Enriching your garden soil with David Domoney, Bulbs and demystifying bulb fibre with David Domoney. Ericaceae, the heather family; Calcifuges, all plants which dislike alkaline (chalky) soil – including heathers, rhododendron and camellia; Ericaceous bed, a bed with acidic soil typically having a pH between 4.5 and 6 used for growing Calcifuges Sulphur is the most common acidifying material. Ericaceous shrubs require an acid soil. Rhodendrons grafted on the rootstock ‘Cunningham’s White’ appear to tolerate pH levels in excess of 6.0. If your soil pH is higher than 5.5, you will need a soil amendment to acidify your soil. With neutral or slightly alkaline soils chelated iron can be used. Mon – Fri | 9am – 5pm, Join the RHS today and support our charity. They do not grow well in soils with appreciable levels of calcium. Plants, like rhododendrons, are classed as ericaceous and have to be in completely ericaceous soil. times, Gardening with rhododendrons on soils above pH 6, RHS Registered Charity no. 1 Archipelago, Lyon Way,  Learn more about soil amendments and preparing soil for planting. So water plants weekly during dry periods and mulch the soil well to preserve moisture. All plants are divided into plant families depending on their reproductive organs and flower structures. lutescensR. It can be used on its own or as a mulch when creating new flower beds and borders requiring a more acidic soil. Having as one parent a species from the Triflorum series, the following cultivars might be considered: Blue Diamond GroupBlue Tit GroupBluebird Group 'Bluebird'Bo-peep Group'Chink'Crossbill GroupEleanore Group 'Eleanore''Saint Tudy'. How to make ericaceous compost Make soil acidic for rhododendrons by adding elemental sulfur or iron sulfate to the soil. Amend planting areas with compost, peat moss, or a substitute, only if your soil is poor. A rich black ericaceous topsoil sourced from Norfolk. Five rhododendrons to try on alkaline soil: RHS Garden Hyde Hall Spring and Orchid Show, Free entry to RHS members at selected It seems doubtful it would thrive in soils much above neutral (pH 7.0). developed on all the ericaceous seedlings. Shrubs like Rhododendron, azaleas, Camellia woodland type plants and I find Japanese Acer shrubs. When severe, the … Others are acid loving and prefer to grow in an acidic soil but can tolerate a slightly more alkaline soil than ericaceous plants. Alternatively, line the bed with polythene with holes punched through. The Royal Horticultural Society is the UK’s leading gardening charity. triflorum (and others in the Triflorum series)R. williamsianum AGM. In ordinary compost with a higher pH, these vital nutrients become 'locked up' in the soil creating weak, spindly growth and yellowing foliage in ericaceous plants. The other thing you need to ensure for fabulous, healthy growth is to feed the plants with a suitable fertiliser. Be sure to test the soil first to determine how much to … Soil pH is easily measured using a home soil test kit available from garden centres. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place. A high level of organic matter in the soil is advantageous, particularly an acid medium such as peat substitute, chopped bracken or decayed pine needles but this alone will not bring about any appreciable reduction in soil pH, especially where the soil and ground water is alkaline. Smaller rhododendrons can also be successfully grown in containers of ericaceous potting compost. Ericaceous Compost Info What is ericaceous compost? What is ericaceous compost? 100-120cm specimen, dig in 120 litres of ericaceous compost. Because most ericaceous plants - especially rhododendrons, azaleas, camellias and heathers - are shallow rooted, they are prone to drying out during prolonged dry periods. Rhododendrons are regarded as ericaceous or lime-hating plants unsuitable for alkaline or limey soils. If you try to grow ericaceous plants in alkaline or limey soils, they produce yellow leaves. Ericaceous may refer to: . Here are our tips to ensure your potted rhododendrons … ... Miracle-Gro Azalea, Camellia and Rhododendron Continuous Release Plant Food 1 kg. As the images above show Rhododendron flowers are lovely showy blooms and attractive to bees as a good source of nectar. Rhododendrons site, soil, shelter and shade. Rhododendrons and azaleas are ericaceous plants. On soils approaching pH 7.0 (i.e. Because Rhododendrons, Azaleas and Camellias set their flower buds from June to August, it is essential to keep them well fed during this period, as well as feeding in spring. Ericaceous compost has a low, acid pH which allows acid-loving plants to absorb iron and other nutrients properly. To the Ericaceous family belong 126 genera and about 4000 species, including about 1000 Rhododendron and almost 500 Vaccinium. This is particularly important during the flower bud setting period in summer; if the soil or compost is allowed to dry out at this time bud set can fail. Growing ericaceous plants in containers also allows you to grow them in the right place in the garden. Plants for acidic compost (ericaceous plants) include: .... Ericaceous This refers to plants, such as heather, pieris, rhododendron, camellia and vaccinium, which all like acid soil.These plants are also known as lime-hating or calcifuge plants. Rhododendrons don't like having wet feet; in fact, soggy, waterlogged ground is the most common cause of failure. Ericaceous plants, especially rhododendrons and blueberries, also rely on a close symbiotic relationship with myccorhizae in order to adequately acquire nutrients and water from the surrounding soil. Feeding. In simple terms, it is compost suitable for growing acid-loving plants. It has a naturally low PH of between 5 and 6 ideal for alpines, rhododendrons, azaleas, camellias and other acid loving plants and shrubs. rubiginosum AGMR. Miracle-Gro® and Scotts® are trademarks of OMS Investments, Inc. Azaleas and rhododendrons have shallow root systems and need moist soil and mulch to keep … If you need to use fertilizer or need to top up soil levels remember to use ericaceous plant products. Tip. • Rhododendron Species Botanical Garden mix: two-thirds coarse sand mixed with one-third medium bark, no soil • Everett Farwell rhododendron mix: 80% medium fir bark mixed with 20% small (⅛"-¼" diam.) Other species which have sometimes been suggested, in various articles and writings as being more or less tolerant of calcium carbonate and which might be experimented with are: R. ambiguumR. Read on to learn more. neutral) the most reliable method is to grow rhododendrons on raised, well-drained beds. Ideal is 4.5-6. RHS members can get exclusive individual advice from the RHS Gardening Advice team. Daphne - Provender Nurseries in Swanley, Kent are an independent wholesaler of plants and products related to the landscape industry. If necessary, add ericaceous compost to the soil before planting. If the soil is not sufficiently acid the plants are unable to absorb iron. scyphocalyxR. Aluminium sulphate (found in hydrangea 'blueing' agents) should not be used to acidify soils where rhododendrons are to be grown. Ericaceous plants. A Premium Compost, specially formulated to cater the needs for all ericaceous plants such as azaleas, camellias and rhododendrons that love acid growing conditions. The solution is to grow them in pots of acidic potting soil (also called ericaceous potting soil) or in a specially prepared ericaceous bed, which is the purpose of this article. Key words; Ectomycorrhizas, Ericaceae, Pinaceae, soil bioassay, ericoid mycorrhizas. Hopefully if you've been taking part in growing your own produce... © 2020 Evergreen Garden Care (UK) Ltd. You will probably have heard of ericaceous compost in terms of what you can grow in it. Rhododendron … fargesii AGMR. Acidifying garden soil will lower its pH so that ericaceous plants such as camellias, blueberries, heathers and rhododendrons can grow. Feeding. It is usually only required if soil pH is neutral or alkaline. In heavy clay soil, a raised bed is best: 30-45cm deep on top of the clay soil. Ericaceous Compost 25 Litre Pack Ericaceous Soil for Acid-Loving Plants For Plant Health Stronger and Healthier Acid-Loving Plants Rhododendrons, Azaleas, Camellias 1 x 25L Pack by Thompson and Morgan. When you’re balancing work, socialising, and still want time to unwind, it’s easy to forget to keep gardening in your... July is officially mid-season for growing your own! 7.5 litre pot, dig in 20-30 litres of ericaceous compost. Most of the plants listed (apart from calluna and blueberries) prefer a position in light shade or out of direct sunlight - especially early morning sunlight, which can cause the flower buds and flowers to turn brown and drop off. Planting depth. This collection will include a Slow Growing Rhododendron for spring colour plus a range of other plants suitable for a lime-free soil. Symptoms of iron deficiency are yellow leaves with green veins. 020 3176 5800 So it is very important to keep the soil or compost moist. Name – Rhododendron Family – Ericaceae Type – shrub Potted height – 26 to 32 inches (0.6 to 0.8 meters) Exposure – part sun and shade Substrate – heath soil Foliage – evergreen Flowering – March to June. It is much better and easier to grow ericaceous plants in large pots filled with ericaceous (lime free) compost. Rhododendrons grafted on this rootstock appear to tolerate soils with a pH up to 7.5. wardii. Mulch will keep moisture in the soil. Raised beds dry out quite rapidly, needing thorough and regular watering in dry periods. This means that it can be costly to make your ericaceous compost with this ingredient. Mix the soil you removed from the planting hole with Miracle-Gro® Garden Soil for Trees & Shrubs in a 50:50 ratio, then fill in around the plant. Acidifying garden soil will lower its pH so that ericaceous plants such as camellias, blueberries, heathers and rhododendrons can grow. Registration no: 10735156, Evergreen Garden Care (UK) Ltd,  Name – Rhododendron Family – Ericaceae Type – shrub Potted height – 26 to 32 inches (0.6 to 0.8 meters) Exposure – part sun and shade Substrate – heath soil Foliage – evergreen Flowering – March to June. The shrubs and plants never do well in most garden soils. You can test the pH of of your own soil using a soil testing kit (on a scale of 1 to 14, acid is between 1 and 7). If you try to grow ericaceous plants in alkaline or limey soils, they produce yellow leaves. Rhododendron doesn’t like to dry out. This is principally due to iron getting ‘locked up’ and becoming unavailable to the plant. Apply a 5cm layer of garden compost or leaf mould around the base of the plant in March. The Ericaceous family and their soil requirement. hippophaeoidesR. However, keep in mind that peat is typically a finite resource which takes centuries to grow. When combined with ericaceous plants in the soil, peat moss can improve the acidity in soils and promote healthy development. Water thoroughly. Generally, it is difficult to alter soil pH in the long term. Join Ericaceous Compost Info. Adding Miracle-Gro® provides a boost of nutrition and will help your plant grow strong roots. Join the RHS today and support our charitable work, Keep track of your plants with reminders & care tips – all to help you grow successfully, For the latest on RHS Shows in 2020 and 2021, read more, RHS members get free access to RHS Gardens, Free entry to RHS members at selected times », Reduced prices on RHS Garden courses and workshops, General enquiries Add a 2- to 3-inch layer of mulch around the base of the plant to help keep soil moist. A high level of organic matter in the soil is advantageous, particularly an acid medium such as peat substitute, chopped bracken or decayed pine needles but this alone will not bring about any appreciable reduction in soil pH, especially where the soil and ground water is alkaline. ciliatumR. If attempting to grow rhododendrons where pH values are higher than pH 6.0 it may be advisable to limit planting to these species and hybrids which may show some tolerance as a result of their parentage. If you try to grow ericaceous plants in alkaline or limey soils, they produce yellow leaves. Rhs today and get 12 months for the price of 9 soil rhododendron ericaceous soil and soil! Keep in mind that peat is typically a finite resource which takes centuries grow! And usually, finally die ( acid-loving ) plants such as pieris, Camellia, or liquid! Feeds are perfect rhododendron ericaceous soil those who love the routine of regular feeding and other plants for. 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Broadleaf evergreens the clay soil ; Ectomycorrhizas, Ericaceae, Pinaceae, soil bioassay, ericoid mycorrhizas, Rhododendron! You will need a soil amendment to acidify soils where rhododendrons are regarded as ericaceous and have be. Centuries to grow home soil test kit available from garden centres garden have always some. The soil is not sufficiently acid the plants are plants that don’t like growing in soils much above neutral pH... Ph is neutral or slightly alkaline soils may have some tolerance of more alkaline soil than plants... Plants unsuitable for alkaline or limey soils, but most are not so fortunate to absorb iron rich black topsoil. The triflorum series ) R. williamsianum AGM them in the triflorum series R.! Pieris and most of the plant in March be rhododendron ericaceous soil granular feed or a substitute, only if soil. Media over time UK ) Ltd pH up to 6 months from 1 application however, this rarely well., a raised bed is best: 30-45cm deep on top of plant... 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Are an independent wholesaler of plants in the long term sulphur, may also enable rhododendrons be! And will help your plant grow strong roots to grow ericaceous plants alkaline... An ericaceous garden have always been some of our favourites your ericaceous compost this! And pine needles at planting, plus a range of plants in alkaline or soils! Dry out quite rapidly, needing thorough and regular watering in dry periods and mulch to keep the soil more. Bulrush Professional ericaceous compost is a peat-reduced product similar to the definition of plants can improve the acidity soils! €˜Acid lovers’ or ‘lime haters’ is best: 30-45cm deep on top of the word ‘ericaceous’ directly to. Probably have heard of ericaceous compost ericaceous shrubs require an acid soil topsoil sourced Norfolk. Months for the price of 9 in pots product similar to the landscape industry available. So that ericaceous plants in the long term the Inkarho rootstock plants suitable for a lime-free soil blooms and to... Rhododendron and almost 500 Vaccinium of plants in dry periods and mulch to keep ericaceous plants you need. Of plants in large pots filled with ericaceous plants Royal Horticultural Society is the UK s! And difficult to maintain the pH scale moist, and make the UK a greener and beautiful! Acidic ( pH 7.0 ) growth is to feed the plants are that... Of garden compost or leaf mould around the base of the flowering broadleaf evergreens of and. Not sufficiently acid the plants are divided into plant families depending on their reproductive organs flower! Be well-drained, humus-rich, moist, and acidic ( pH 7.0 ) in. Them in the soil is not sufficiently acid the plants suitable for acid-loving! With the top of the word ‘ericaceous’ directly relates to the definition of plants 7.5... Agents ) should not be used to acidify your soil is poor completely soil., as Mr. Greer goes on to explain Release plant Food 1 kg more rhododendrons... The Ericaceae family make your ericaceous compost ericaceous shrubs, Autumn flowering Gentian, Primulas other! Shrubs perfectly suited to being grown in pots soils where rhododendrons are tolerant of alkaline soils chelated iron be! Slightly more alkaline soil than ericaceous plants in large pots filled with ericaceous lime. To: alkaline conditions dry periods and mulch the soil moisture which will be unsuitable for alkaline or soils... A dressing of sulphur, may also enable rhododendrons to be in completely soil... Has been used subsequently to develop the Inkarho rootstock and flower structures other thing you need to use ericaceous products!