Kelp-based plant support for the growing season.
The Coastal Kelp Range is a small set of kelp-based biostimulant products designed to complement Coastal Compost. They are intended to support root establishment, soil biology and plant resilience through the season.
Coastal Fermented Kelp
A fermented kelp-based plant and soil support product, designed for watering in new plants, supporting tired soil and helping root establishment.
- New planting
- Root establishment
- Soil biology support
- Beds, borders, vegetables, shrubs and trees
Coastal Unfiltered Kelp
A whole-kelp, unfiltered product containing natural kelp compounds and suspended organic material. Designed as a richer seasonal soil drench for established plants.
- Established plants
- Seasonal feeding
- Trees, shrubs, beds and vegetables
- Soil drench applications
Coastal Foliar Spray
A filtered kelp-based foliar spray for direct application to leaves during active growth. A simple way to give plants a regular coastal boost through the season.
- Active growth
- Vegetables
- Flowering plants
- Ornamentals
- Hungry crops such as tomatoes
£24 per bottle when bundled with compost
Order any Coastal Compost format together with all three Coastal Kelp Range bottles and each bottle drops to £24 — a saving across the full kelp range.
- 1 × Coastal Fermented Kelp — £24
- 1 × Coastal Unfiltered Kelp — £24
- 1 × Coastal Foliar Spray — £24
- Plus your chosen Coastal Compost format
How much do I need?
Our Coastal Kelp products are concentrated and designed to be used carefully through the growing season, not applied heavily. More is not better — regular, light use is the best approach.
Typical garden use
For most domestic gardens, one bottle of each product should be enough for a full growing season when used as directed.
- 1 bottle of Coastal Fermented Kelp for planting, root establishment and soil support
- 1 bottle of Coastal Unfiltered Kelp for occasional seasonal soil drenches
- 1 bottle of Coastal Foliar Spray for light foliar applications during active growth
Maximum seasonal guide
As a general guide, around 2.5 litres of kelp biostimulant is enough for up to 1,000m² of garden area over a growing season.
Up to 250ml per season
Up to 625ml per season
Up to 1.25L per season
Up to 2.5L per season
This is a maximum seasonal guide, not a target. Smaller gardens, pots, raised beds and regularly maintained borders may need much less.
Avoid overuse
- Do not apply undiluted unless specifically instructed
- Do not keep increasing the dose if plants already look healthy
- Avoid repeated heavy applications
- Apply to moist soil where possible
- Do not apply in hot direct sun, especially for foliar sprays
- For foliar sprays, test on a small area first if applying to delicate plants
Used properly, the Coastal Kelp Range should last most gardens through the season while helping to support healthier roots, stronger plants and more active soil biology.