Liquid Fertiliser

Liquid fertiliser

The fastest way to feed a plant

Organic liquid fertilisers are the quickest way to deliver nutrients to a plant: applied as a foliar spray for direct leaf uptake, or watered in at the roots for rapid soil-level feeding. They're ideal for correcting a deficiency, supporting heavy fruit set, or running a regular weekly feed alongside dry amendments. The Dr Forest liquid range is made with organic ingredients and covers everything from micronised mineral suspensions to chelated trace elements and concentrated seaweed biostimulants.

What's in the range

  • Liquid suspension fertilisers: micronised minerals (calcium phosphate, magnesium, gypsum, silica) suspended in pourable form. Easy to dose, fast to absorb, no mixing required.
  • Liquid gypsum: 20% calcium and 15% sulphur as micronised calcium sulphate. A fast-acting liquid clay breaker for heavy clay soil and a calcium and sulphur feed for lawns and chloride-sensitive crops, with no change to soil pH.
  • Liquid silica: micronised diatomaceous earth that strengthens cell walls and improves heat and drought resilience.
  • Chelated micro-nutrients: Micro 7 delivers seven essential trace elements bonded for maximum plant availability.
  • Seaweed biostimulants: concentrated kelp extracts loaded with growth promoters, alginates and natural plant hormones.
  • Seedling root drench: NPK plus humic acid for the first weeks of growth and after transplanting.
  • Microbial liquid feeds: living, soil-style foliar and root applications that combine biology with nutrition.

How to apply

Most liquids in this range work both as a soil drench (watered in at the roots) and as a foliar spray (misted onto leaves for fast uptake). They layer cleanly into any feeding programme: pair with dry organic amendments for steady release plus targeted top-ups. Application rates are on each product page.

Working out how much to buy? Try the liquid fertiliser calculator. For a full-season schedule, see the Dr Forest feeding programme.

Liquid fertiliser: common questions

Foliar sprays act fastest (within hours) and are best for correcting visible deficiencies. Soil drenches feed roots and microbes for longer-lasting effect.
Most are compatible, but always patch-test first. Avoid mixing strongly alkaline products with acid-pH biostimulants.
Application frequency varies by product. Check each product page. Most are reduced or paused during winter and dormancy.
Yes, but agitate well before pouring and use a 50-mesh or coarser nozzle to prevent clogging.
Liquid gypsum is micronised calcium sulphate in a pourable suspension. On heavy clay soil it helps break up compaction and improve drainage; on lawns it delivers calcium and sulphur without changing the soil pH. It's a popular choice for clay soil and lawns across the UK.