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Fertilising guide

How to fertilise Nerved Catmint (Nepeta nervosa)— schedule & NPK

Also called Nerved Catmint, Kashmir Catmint.

More about nerved catmint

About Nerved Catmint

Nepeta nervosa · also called Nerved Catmint, Kashmir Catmint · flowering

Nerved Catmint is a compact, bushy species from Kashmir producing dense spikes of bright blue to violet flowers through summer. It is distinct for its prominently veined, lance-shaped leaves compared to the soft grey foliage of most catmints. Ideal for rock gardens, raised beds, and front-of-border plantings in full sun with sharp drainage.

Growth habit: Compact, bushy herbaceous perennial

What fertiliser nerved catmint actually wants — and why

Nerved Catmint is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.

A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.

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 nerved catmint: 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 nerved catmint, 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 nerved catmint:

Minimal feeding required. A very light application of balanced fertiliser in early spring is adequate. Rich soil causes lax, uncharacteristic growth. Grows best on lean, mineral substrates. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.

The dormant-season rule matters more than the exact interval: skip feeding entirely when nerved catmint 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 nerved catmint

Half strength is the safe default for nerved catmint — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

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

Signs you are over-feeding nerved catmint

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

Signs you are under-feeding nerved catmint

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

Flushing and leaching the salts

Flush the pot of nerved catmint with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.

Organic vs synthetic feeds for nerved catmint

Organic options

A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.

Synthetic / liquid feeds

A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.

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 nerved catmint — frequently asked questions

What fertiliser does nerved catmint need?

A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Nerved Catmint is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.

How often should I feed nerved catmint?

Minimal feeding required. A very light application of balanced fertiliser in early spring is adequate. Rich soil causes lax, uncharacteristic growth. Grows best on lean, mineral substrates. Minimal feeding required. A very light application of balanced fertiliser in early spring is adequate. Rich soil causes lax, uncharacteristic growth. Grows best on lean, mineral substrates. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.

What strength of feed for nerved catmint?

Half strength is the safe default for nerved catmint — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding nerved catmint look like?

Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding nerved catmint year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.

Should I flush the soil of nerved catmint?

Flush the pot of nerved catmint with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.

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