Liquid Fertiliser

Liquid feeds for when plants need help now — taken up through roots or foliage within days, not weeks. The fastest way to correct a deficiency mid-season.

Liquid fertiliser: the fastest way to feed a plant

A granular feed takes weeks to break down and reach the root. A liquid takes days, and a foliar spray takes hours. That is the whole case for keeping liquids alongside your dry amendments: they are what you reach for when a plant needs help now, not next month.

Everything on this page is an organic liquid fertiliser: concentrated liquid plant food, single-nutrient correctors and micronised mineral suspensions, all of them diluted into a watering can or a sprayer. Sixteen products in total, blended in Stockport. If you already run a granular programme, treat these liquid fertilisers as the correction layer rather than a replacement for it.

What is in the range

Liquid or granular: when a liquid suits better

Granular carries the season; a liquid feed handles speed. The liquid earns its place in four situations.

  • Something is visibly short now. Pale new growth, yellowing between the veins, a crop that has stalled. A liquid corrects in days, while a granular is still breaking down.
  • Containers, grow bags and raised beds. Limited soil volume, frequent watering, nutrients leaving through the bottom. Dilute feeding suits them better than one large application; dilution rates are on every product page.
  • Peak demand. A tomato in full fruit or a strawberry bed in July draws more potassium than a single spring application ever allowed for; when to feed tomatoes in pots sets out the stages.
  • Cold soil, seedlings and transplants. Slow release depends on soil biology, which barely moves in cold ground, and small root systems cannot mine a bag of granules anyway.

The reverse holds just as firmly: if you want one application to cover a bed for the season, granular is simpler and cheaper, and the granular range is where to look.

Foliar feeding

Foliar feeding means applying a dilute nutrient solution to the leaf rather than the soil, and letting it enter through the cuticle and the stomata. It is fast, working in hours, and efficient, because a small quantity goes where it is wanted instead of into the soil's chemistry, where much of it can lock up before a root reaches it.

It is also routinely oversold, so here is the honest version. A foliar feed works well for the mobile nutrients and trace elements: nitrogen, potassium, magnesium, iron, manganese, zinc and boron all move readily. It is much less reliable for calcium, which travels with the transpiration stream and barely redistributes once it has arrived. The published evidence for foliar calcium correcting a calcium problem in fruit is thin, and we would rather say so than imply a spray settles it — consistent watering and calcium in the root zone do more. Spray in early morning or evening rather than strong sun, cover the underside of the leaf as well as the top, and add a natural wetting agent so the solution spreads instead of beading. Dilution rates are on every product page.

Liquid phosphorus

Phosphorus is the awkward nutrient: it moves poorly through soil, locks up at both ends of the pH scale, and releases from rock sources across seasons rather than weeks. A liquid phosphorus fertilizer — the American spelling is how most of these searches arrive, and it means the same as liquid phosphorus fertiliser — is the quickest way to make it available at root establishment and flower initiation. Both complete liquid feeds above carry phosphorus alongside nitrogen and potassium, and there is a liquid phosphorus fertiliser on its own if you would rather dose it directly; if you are not in a hurry, micronised rock phosphate on the granular page is the long-term route. Either way, be conservative. Phosphorus is easy to over-apply and slow to leave the soil.

Liquid fertiliser UK: made in Stockport, sold direct

This range is blended and bottled in Stockport in small batches. If you have been comparing liquid fertilizer suppliers, it is worth knowing which of them actually make the product: this is the manufacturer, not a label applied to someone else's drum. Every bottle carries a full analysis. Free UK delivery over £40. ★★★★★ 5-star across all platforms · 4,300+ reviews.

Foliar or root drench

Most of these work both ways. Foliar sprays act fastest, within hours, and are the right choice when you can see a deficiency and want it corrected quickly. Root drenches feed the soil as well as the plant and last longer. A wetting agent added to either makes a noticeable difference to how evenly the solution spreads, which is worth understanding before you spray anything: here is what a wetting agent actually does.

Working out how much to mix? Use the liquid fertiliser calculator.

Common questions

When should I use a foliar spray rather than a soil drench?

Foliar for speed, when there is a visible deficiency you want corrected in days. Drench for depth, when you want to feed roots and soil biology for longer-lasting effect. Many growers do both across a week.

Can I mix several liquid feeds in one watering can?

Most are compatible, but patch-test first. Avoid mixing strongly alkaline products with acid-pH biostimulants, because they can precipitate out and clog a sprayer.

Are micronised suspensions safe in a sprayer?

Yes. Agitate well before pouring and use a 50-mesh or coarser nozzle to prevent clogging.

What is liquid gypsum for?

Micronised calcium sulphate in a pourable suspension. On heavy clay it helps break up compaction and improve drainage; on lawns it delivers calcium and sulphur without changing pH. It is also the fastest calcium correction for blossom end rot. More detail in the liquid gypsum FAQ.

How often should I apply?

It varies by product, and rates are on each page. Most are reduced or paused through winter and dormancy.

Do liquids replace my granular feed?

Not usually. Granular feeds carry the season, liquids handle speed and correction. Most growers run both.

Is a liquid fertiliser the same thing as a liquid plant food?

In practice, yes. "Plant food" is the everyday term and "fertiliser" is the trade one, and they describe the same bottle; what a fertiliser actually is unpacks the definition. What actually distinguishes one from another is the analysis on the label and whether it is a complete feed or a single nutrient.

Will rain wash a foliar feed off?

Some of it, yes. Give a foliar feed a few dry hours to be taken up before rain arrives, and reapply if it is washed off within the hour. A root drench is unaffected either way, which makes it the safer choice in an unsettled week.