Ericaceous topsoil
Ericaceous topsoil - image 2

Outdoor Aggregates’ Ericaceous Topsoil delivers the perfect acidic environment with a natural pH of 4-6 for all your acid-loving plants. This premium blend features a friable sandy loam texture packed with high organic matter, retaining moisture while staying free-draining to encourage strong root development and vibrant growth. Perfect for:

  • rhododendrons, azaleas and camellias
  • heathers, pieris and hydrangeas
  • blueberry bushes and other acid-lovers

Lime-free and consistently tested, our Ericaceous Topsoil prevents yellowing leaves by unlocking essential nutrients. Ideal for creating healthy, low-maintenance displays to renovate your indoor and outdoor spaces.

Ericaceous Topsoil

Price range: £127.00 through £237.00 inc. VAT

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Tap a job to fill the depth in. For a raised bed, use the depth of the bed, usually 200 to 300mm.

Key Benefits

  • pH 4-6 ideal for acid loving plants
  • Regularly tested to BS3882:2015 and BS3882 for specific purpose acidic topsoil
  • Lime free
  • Consistent, sandy loam texture
  • Friable, easy to use
  • Free-draining
  • Well supplied with organic matter and essential nutrients
  • Retains moisture and nutrients

Ideal for

  • Acidic plants such as Rhododendrons, Azaleas, Camellias, Heathers, Pieris, Blueberry, Cassiope, Eucryphia, Enkianthus, Fothergilla, Gaultheria, Leucothoe, Nyssa, Kalmia, Pseudowintera, Styrax and Vaccinium.

Not suitable for

  • Alkaline loving plants & vegetables
Quantity

Builders Bag (approx. 700L), 5 x 25L Bags, 10 x 25L Bags, 15 x 25L Bags, 20 x 25L Bags, 30 x 25L Bags, 40 x 25L Bags

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Specifications, Inspirational Ideas & DIY Guides

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Why Professionals & Homeowners Choose, Applications, DIY Guides & Inspirational Ideas, Maintenance, Purchasing Tips, FAQs, Related Products

Overview

Ericaceous topsoil is a screened sandy loam with a high organic content, supplied at pH 4 to 6, the band where iron and manganese stay available to lime-hating plants instead of locking up in the ground. It is friable and free-draining, so it beds down around a root ball without leaving air pockets.

Why Professionals & Homeowners Choose Ericaceous Topsoil

The appeal is that it does one job properly rather than several jobs adequately.

  • Its pH 4 to 6 range covers what acid-lovers want, and rhododendrons in particular grow best between pH 4.5 and 6.0.
  • Being lime-free, the bed you build this spring is still an acid bed in three years.
  • The sandy loam texture holds a rootball steady while the plant establishes, which a bagged compost does not.
  • Its organic content keeps moisture in, which matters because raised and mounded beds dry out faster than the ground.
  • It will not turn a chalky border acidic, and I would rather say so. Where free lime or chalk is in the ground, that soil cannot realistically be acidified, so the job is to build a separate volume and plant into that.

Ericaceous Topsoil Applications

This soil is for the lime-haters: Rhododendron and its azaleas, Camellia japonica (camellia), Pieris japonica (lily-of-the-valley shrub), Calluna vulgaris (ling heather), Vaccinium corymbosum (highbush blueberry) and Acer palmatum (Japanese maple). It is not the soil for a vegetable bed, for brassicas, or for Mediterranean planting that wants it dry and limy. Pots want an ericaceous compost whereas this is soil for filling a volume in the ground.

  • Raised beds for acid-lovers on neutral or chalky ground, filled to a minimum depth of 300mm over a lime-free drainage layer such as sharp sand.
  • Planting pockets in an existing border, roughly 600mm across and 300mm deep (about 75 litres per shrub).
  • Blueberry beds, which want a pH of about 4.5 to 5.0 and should never see lime.
  • Mounded beds with no walls at all, heathers planted on the lower slope.
  • Large planters, blended roughly half and half with an ericaceous compost.

DIY Guides & Inspirational Ideas

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Ericaceous Topsoil Maintenance

An ericaceous bed needs three things kept up: a pH test every two years, an acidic mulch on top, and nothing alkaline near it. Mulch with pine bark at 5 to 7.5cm once the plants are in, and top the bed up 50mm at a time as it settles. Pine bark sits at pH 4.5 to 5.5, so it will not fight the bed. Water from a butt where you can, because lime-haters do better on rainwater than on hard tap water. Never lime it, keep old mortar rubble out, and do not let cement washings run in off a nearby path.

Purchasing Tips

Work in litres, because that is how this soil is sold. A 700 litre builders’ bag is 0.7 cubic metres: about 7m² at 100mm deep, 4.7m² at 150mm, or 2.3m² at the 300mm you want under rhododendrons. One 25 litre bag covers a quarter of a square metre at 100mm. Those figures are before the soil beds down, so add another 10 to 20% on top of whatever you work out. Forty 25 litre bags is 1,000 litres, more than a builders bag, so choose on access: bags can be carried through side gate, a builders bag comes off the lorry at the kerb. Use the topsoil calculator on our good quality topsoil guide to get the quantity right.

If you would rather talk your ericaceous topsoil order through with a person, ring Outdoor Aggregates on 0330 043 7585. The office is open 7am to 7pm, seven days a week.

Ericaceous Topsoil FAQs

What is ericaceous topsoil?

Ericaceous topsoil is an acidic screened topsoil, supplied here as a sandy loam at pH 4 to 6, for plants that will not feed properly in chalky or neutral ground. The name comes from Ericaceae, the family covering heathers, rhododendrons and blueberries.

What pH should ericaceous topsoil be?

Ericaceous topsoil should sit between pH 4 and 6, and the lower half of that range is the safer place to be. Rhododendrons want 4.5 to 6.0 and blueberries 4.5 to 5.0, so anything sold as ericaceous at pH 6.2 is not doing the job.

How deep does ericaceous topsoil need to be for rhododendrons?

Rhododendrons need a minimum of 300mm of ericaceous soil above a lime-free drainage layer such as sharp sand. They are shallow-rooting and dislike deep planting, so bed depth matters more than hole depth.

How much ericaceous topsoil do I need?

A 700 litre builders bag of ericaceous topsoil covers about 7m² at 100mm deep, 4.7m² at 150mm, or 2.3m² at 300mm. Allow 10 to 20% for settlement, and roughly 75 litres for one planting pocket 600mm across and 300mm deep.

Can you use ericaceous topsoil in pots and containers?

Ericaceous topsoil is a soil rather than a potting compost, so in a large planter blend it about half and half with an ericaceous compost. For pots and troughs, use an ericaceous compost on its own.

Can you use ericaceous topsoil to acidify a chalky border?

Ericaceous topsoil will not acidify a chalky border, because free lime in the ground around it keeps neutralising it. Build a raised or mounded bed and fill it with this soil instead.

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