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Mushroom Compost • Soil Conditioner & Mulch • Brilliant for Clay & Veg Beds

Improve heavy clay, boost tired borders and feed your vegetable garden with our spent mushroom compost — a nutrient-rich, steam-sterilised soil conditioner that helps soils hold moisture, improves structure and supports stronger root growth.

Mushroom Compost in Bulk Bags & 75 Litre Bags

• Available in 750L bulk bags, 1200L jumbo bags and pallets of 75L bags (10–40 bags per pallet)
• Next working day delivery available when ordered before 12:30pm (Mon–Fri)

Why Choose Our Mushroom Compost?

• ✔ Steam sterilised (helps ensure it’s free from weeds and spores)
• ✔ Adds humus + organic matter for healthier soil
• ✔ Helps break up heavy clay and improve drainage
• ✔ Improves moisture retention in light sandy soils
• ✔ Encourages strong root development
• ✔ Excellent value soil conditioner for larger gardens

Best Uses

• Mulching: a thick layer helps suppress weeds, lock in moisture and improve soil over time
• Soil conditioning: dig in to improve structure and fertility
• Vegetable gardens: particularly good for brassicas (cabbage, sprouts, cauliflower, broccoli)
• Tree & shrub planting: improves moisture and nutrient availability around roots

Important: When Not To Use It

Mushroom compost is a rich soil conditioner and is best used mixed with soil or as a mulch layer. It is not recommended as a direct growing medium for potting, seed starting, young plants or delicate acid-loving plants.

Bulk Loose Loads (20m³+)

For larger projects, we can supply bulk loose loads (20m³+). Call us on 01785 850 653 or email for a competitive quote.

Typical Analysis

• Mid-brown in colour
• pH Level: 6.5–7
• Organic Matter: 66%
• Ammonia: 0.26%
• Magnesium: 0.4%
• Nitrate: 0.08%
• Phosphorus: 0.6%
• Potassium: 3.1%
• Total Nitrogen: 2.4%

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Mushroom Compost vs Garden Compost – What’s the Difference?

Mushroom Compost is primarily a soil conditioner and mulch. It improves soil structure and organic matter but is not designed as a standalone growing medium.

Garden Compost is more balanced for planting and container use.

If you're improving heavy soil or mulching large areas, mushroom compost is often the better-value option.

Frequently Asked Questions

Is mushroom compost good for vegetable gardens?

Yes. It is particularly beneficial for brassicas such as cabbage, broccoli and cauliflower due to its nutrient profile and neutral pH.

Does mushroom compost contain weeds?

No. It is steam sterilised after mushroom production to help eliminate weeds and spores.

Can mushroom compost be used for pots?

No. It is too rich to use as a direct growing medium and should be mixed into soil or used as a mulch.

What pH is mushroom compost?

Typically between pH 6.5–7, making it close to neutral.

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Fast & Reliable Nationwide Delivery

Choose your delivery date at checkout — ideal if you’re planning a mulching weekend or prepping beds ahead of planting.

FREE standard pallet delivery (2–3 working days) is available to many postcode areas.

For the rest of the UK, we offer low-cost delivery options from £4.95 — and we’re often quicker and better value than many national garden suppliers.

Delivery Options

• Book a delivery date to suit your schedule
• Standard delivery: 2–3 working days (Free in selected postcode zones)
• Express delivery: Next working day when ordered before 12:30pm (Mon–Fri)
• 98%+ on-time delivery performance

Free Standard Delivery Postcodes

FREE pallet delivery is available to the following postcode areas:

B, BB, BD, BL, CB, CF, CH, CV, CW, DE, DN, DY, FY, GL, HD, HX, L, LE, LN, LS, M, MK, NG, NN, NP, OL, PE, PR, S, SK, ST, TF, WA, WF, WN, WR, WS, WV

Other postcode zones carry delivery charges starting from £4.95.

How We Deliver

Pallet deliveries are made on 18-tonne curtain-sided lorries and offloaded using a tail lift and pallet truck to the kerbside.

• A smooth, level surface (tarmac/paving) is required for offloading
• We cannot offload onto gravel or up steep slopes

Please note: we do not deliver with a HIAB crane.

Returns & Failed Deliveries

Please read delivery information carefully. Failed delivery due to unsuitable access may result in re-delivery or return/cancellation charges (costs vary by postcode).

If you have any concerns about access, call us on 01785 850 653 before ordering — we’re happy to help.

Please note items may be delivered in multiple deliveries.

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How Much Do I Need?

As a mulch: apply roughly 5–7cm over beds/borders (avoid direct contact with stems).

As a soil improver: dig in around 2–5cm into the top layer of soil.

Use the calculator tab below to work out the volume you need.

Use the calculator tab below to work out the volume you need.

Settling note: due to the open structure of mushroom compost it can settle more than other composts — we recommend allowing up to 25% extra for larger areas.