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Fertilising guide

How to fertilise Mosquito Plant (Agastache cana)— schedule & NPK

Also called Mosquito Plant, Texas Hummingbird Mint, Double Bubble Mint, Bubblegum Mint.

More about mosquito plant

About Mosquito Plant

Agastache cana · also called Mosquito Plant, Texas Hummingbird Mint · flowering

A heat-loving, drought-tolerant perennial native to the Chihuahuan Desert borderlands of Texas and New Mexico. It produces dense spikes of deep rose-pink tubular flowers beloved by hummingbirds and butterflies from midsummer through autumn. Foliage releases a bubblegum-mint scent when crushed. Excellent for xeriscape and pollinator gardens.

Growth habit: Upright, bushy perennial; woody at base with age

What fertiliser mosquito plant actually wants — and why

Mosquito Plant 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 mosquito plant: 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 mosquito plant, 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 mosquito plant:

Generally requires no supplemental feeding in lean soils. If growth is very slow in poor sandy soil, apply a dilute balanced fertiliser once in spring. Avoid high-nitrogen feeds which reduce flowering. 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 mosquito plant 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 mosquito plant

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

Signs you are over-feeding mosquito plant

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

Signs you are under-feeding mosquito plant

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

Flushing and leaching the salts

Flush the pot of mosquito plant 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 mosquito plant

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 mosquito plant — frequently asked questions

What fertiliser does mosquito plant 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. Mosquito Plant 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 mosquito plant?

Generally requires no supplemental feeding in lean soils. If growth is very slow in poor sandy soil, apply a dilute balanced fertiliser once in spring. Avoid high-nitrogen feeds which reduce flowering. Generally requires no supplemental feeding in lean soils. If growth is very slow in poor sandy soil, apply a dilute balanced fertiliser once in spring. Avoid high-nitrogen feeds which reduce flowering. 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 mosquito plant?

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

What does over-feeding mosquito plant 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 mosquito plant 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 mosquito plant?

Flush the pot of mosquito plant 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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