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Fertilising guide

How to fertilise Nepeta 'Walker's Low' (Nepeta × faassenii 'Walker's Low')— schedule & NPK

Also called Walker's Low catmint.

More about nepeta 'walker's low'

About Nepeta 'Walker's Low'

Nepeta × faassenii 'Walker's Low' · also called Walker's Low catmint · flowering

A billowing, aromatic catmint smothered in lavender-blue flowers from late spring into autumn above soft grey-green foliage. Despite its name it is fairly tall and arching, forming a haze that bees and butterflies adore. Exceptionally tough, drought-tolerant, and deer-resistant, 'Walker's Low' rebounds vigorously after a hard shear and shines as a rose companion and border edger.

Growth habit: Vigorous, mounding then arching aromatic perennial that forms a soft, spreading haze of stems and flowers.

What fertiliser nepeta 'walker's low' actually wants — and why

Nepeta 'Walker's Low' 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 nepeta 'walker's low': 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 nepeta 'walker's low', 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 nepeta 'walker's low':

Very light feeder. It performs best on lean soil; a thin compost topdressing in spring is enough. Avoid rich feeding, which produces lax, sprawling growth. 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 nepeta 'walker's low' 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 nepeta 'walker's low'

Half strength is the safe default for nepeta 'walker's low' — 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 nepeta 'walker's low' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the nepeta 'walker's low' watering schedule.

Signs you are over-feeding nepeta 'walker's low'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for nepeta 'walker's low':

Signs you are under-feeding nepeta 'walker's low'

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

Flushing and leaching the salts

Flush the pot of nepeta 'walker's low' 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 nepeta 'walker's low'

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 nepeta 'walker's low' — frequently asked questions

What fertiliser does nepeta 'walker's low' 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. Nepeta 'Walker's Low' 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 nepeta 'walker's low'?

Very light feeder. It performs best on lean soil; a thin compost topdressing in spring is enough. Avoid rich feeding, which produces lax, sprawling growth. Very light feeder. It performs best on lean soil; a thin compost topdressing in spring is enough. Avoid rich feeding, which produces lax, sprawling growth. 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 nepeta 'walker's low'?

Half strength is the safe default for nepeta 'walker's low' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding nepeta 'walker's low' 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 nepeta 'walker's low' 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 nepeta 'walker's low'?

Flush the pot of nepeta 'walker's low' 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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