J. Arthur Bower’s John Innes No.3 Compost

(1 customer review)


A traditional loam-based compost with limestone and grit sand. John Innes No. 3 has a high nutrient formula for potting or re-potting mature plants.


Why use?

J. Arthur Bower’s John Innes are traditional, superior quality soil-based composts. John Innes composts have been widely used by gardeners for over 60 years and are valued for their consistently good performance. J. Arthur Bower’s John Innes No. 3 compost has a nutrient level ideally matched to the needs of mature plants and is especially suitable for use in the patio area and final re-potting of tomatoes.

Quality ingredients

  • Loam is the most important ingredient as it provides a natural reservoir of plant foods, trace elements and contains some organic matter which releases nitrogen slowly to the plant. The loam in J. Arthur Bower’s John Innes is screened and sterilised to avoid any soil-borne diseases and insects.
  • The sphagnum moss peat in John Innes compost improves both the aeration and water-retaining capacity, which enables the compost to make maximum use of the nutrients and trace elements in fertilisers.
  • Lime-free grit sand is included to allow excess water to drain from the compost and so prevent water-logging. It also adds weight and provides stability for pot grown plants
  • Ground horticultural-grade limestone is added to give the compost the pH most plants prefer. For lime-hating plants choose John Innes Ericaceous instead
  • The compound fertiliser in John Innes provides the wide spectrum of plant nutrients needed for healthy growth. These include nitrogen for leafy growth, phosphates for root development, potash for flowering and fruiting and trace elements for colour and flavour.

Helpful tips


  • Give your plants fresh, moist air, good light and an even warm temperature.
  • Make sure your containers are clean and free-draining.
  • Close bag of compost after use to keep it moist and prevent contamination.
  • Wear gloves when using this product.
  • Wash hands after use and before eating, drinking and smoking.


  • Expose plants to too much direct sunlight, fumes, draughts, hot air and sudden changes or extremes of temperature.
  • Dry out or over-water your compost – keep it just moist.
  • Store your John Innes compost from one season to another as the nutrient content may become unbalanced.
  • Use in an enclosed space to avoid breathing in dust.

General advice

  • Not suitable for ericaceous (lime-hating) plants
  • Store in a frost free place and away from weed killers and other garden chemicals.
  • Re-seal bag after use.
  • Use in a well ventilated place and avoid breathing dust.
  • Always wear gloves when gardening and then wash hands after use.

Weight25 kg

1 review for J. Arthur Bower’s John Innes No.3 Compost

  1. David Alton (verified owner)

    All items were as described and delivered two days after the order was placed. The roses were in lovely condition, the driver was friendly and helpful and followed the social distancing rules! Will not hesitate to order online in the future and really looking forward to visiting the nursery again when things return to normal.

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