Fertilising guide

How to fertilise Carrot 'Parmex' (Daucus carota subsp. sativus 'Parmex')— schedule & NPK

Also called Parmex carrot, round carrot, Paris Market carrot.

More about carrot 'parmex'

About Carrot 'Parmex'

Daucus carota subsp. sativus 'Parmex' · also called Parmex carrot, round carrot · edible

'Parmex' is a Paris Market type producing small, round, golf-ball-sized orange carrots ideal for shallow soils, heavy clay and containers. Sweet and tender, roots mature fast in about 60-70 days. Sow direct in full sun; its shallow root makes it the best carrot choice for window boxes, pots and stony ground.

Growth habit: Biennial grown as an annual; compact rosette of fine foliage above a small spherical root. Naturally short-rooted and quick to mature.

What fertiliser carrot 'parmex' actually wants — and why

Carrot 'Parmex' stores its crop underground, so the rule is the reverse of leafy plants — go easy on nitrogen, which sends energy into tops at the expense of roots.

For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for carrot 'parmex': match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.

How often to feed carrot 'parmex', and which months

Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For carrot 'parmex':

Light feeder. In open ground, compost dug in pre-sowing suffices. In containers, a low-nitrogen liquid feed every few weeks supports growth without forcing leafy tops at the root's expense. In practice: prepare the bed with well-rotted compost (not fresh manure), then little or no extra feeding through the season (spring through early autumn); a light potassium feed mid-growth at most.

The dormant-season rule matters more than the exact interval: skip feeding entirely when carrot 'parmex' is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.

What strength to mix for carrot 'parmex'

Less is more for carrot 'parmex'. If you feed at all, keep it light and low-nitrogen — the soil preparation does the work, and over-feeding actively spoils the crop.

Feeding always goes onto already-damp soil, never dry roots — water carrot 'parmex' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the carrot 'parmex' watering schedule.

Signs you are over-feeding carrot 'parmex'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for carrot 'parmex':

Large lush leafy tops and small, forked or hairy roots.
Split or cracked roots from a nitrogen-and-water surge.
All foliage and no usable crop at harvest.

Signs you are under-feeding carrot 'parmex'

Genuinely uncommon in reasonable soil — these are not hungry plants.
Pale, weak tops and small roots only in very poor, exhausted ground.
Slow growth across the whole bed in long-uncultivated soil.

If the symptoms point at watering, light or roots rather than nutrition, the full carrot 'parmex' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Flushing is not the issue for carrot 'parmex' — the equivalent care is avoiding fresh manure and high-N feeds entirely, and rotating beds so the soil is not over-rich from a previous hungry crop.

Organic vs synthetic feeds for carrot 'parmex'

Organic options

Well-rotted compost worked in the season before, or for a previous crop, is ideal — never fresh manure. UK: garden compost, low-N blends; US: Espoma Garden-tone sparingly or finished compost. Lean and well-worked beats rich.

Synthetic / liquid feeds

If anything, a low-nitrogen, potassium-leaning feed only — UK: a high-potash feed mid-season at most, never a general high-N; US: a 5-10-10 sparingly. Most root crops crop best with no synthetic feed at all.

Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.

Fertilising carrot 'parmex' — frequently asked questions

What fertiliser does carrot 'parmex' need?

Low-nitrogen, with modest phosphorus and potassium for root development — ideally compost-improved soil rather than a high-N feed. Excess nitrogen forks the roots and grows lush tops instead of a crop. Carrot 'Parmex' stores its crop underground, so the rule is the reverse of leafy plants — go easy on nitrogen, which sends energy into tops at the expense of roots.

How often should I feed carrot 'parmex'?

Light feeder. In open ground, compost dug in pre-sowing suffices. In containers, a low-nitrogen liquid feed every few weeks supports growth without forcing leafy tops at the root's expense. Light feeder. In open ground, compost dug in pre-sowing suffices. In containers, a low-nitrogen liquid feed every few weeks supports growth without forcing leafy tops at the root's expense. In practice: prepare the bed with well-rotted compost (not fresh manure), then little or no extra feeding through the season (spring through early autumn); a light potassium feed mid-growth at most.

What strength of feed for carrot 'parmex'?