We have made the decision to close Waitrose Garden on 7 May 2026 to focus on our core food offering. Customers can continue to order as usual until 23:59 on 7 May.

Seaweed soil enhancer

Seaweed soil enhancer

Seaweed soil enhancer

Seaweed soil enhancer

  • 800g
  • £15.99
  • In stock (delivery within 3-4 working days)
Delivery options
  • Standard £5.99
  • Named Day £10.99
  • Sustainably harvested from UK shores
  • Improves soil structure & increases organic matter
  • Stimulates plant growth, germination and yields

This natural soil enhancer is made in the UK from 100% sustainably sourced dried granular seaweed. Helping to improve the structure of soil, it also adds nutrients including nitrogen, potassium, phosphate and magnesium plus plant hormones to boost growth, germination and yields.

As a bonus the spiky texture makes it uncomfortable to slugs and snails, providing an effective pest deterrent.

How to use:

Add a layer of seaweed to the top of the soil around your plants, in beds or planters. Apply 2-3mm deep around individual plants. Water well, and reapply as necessary. Replenish every 3-4 weeks or as required. If using to deter slugs ensure no leaves are overhanging the seaweed.