Fertilising guide
How to fertilise Shrimp Plant (Justicia brandegeeana)— schedule & NPK
Also called Shrimp plant, Mexican shrimp plant, False hop, Shrimp bush.
More about shrimp plant
About Shrimp Plant
Justicia brandegeeana · also called Shrimp plant, Mexican shrimp plant · flowering
The shrimp plant (Justicia brandegeeana) is a tropical evergreen shrub in the acanthus family, prized for arching spikes of red-bronze bracts that resemble a shrimp and bloom nearly year-round. Give it bright light, evenly moist soil, and warmth. Not individually listed by the ASPCA, so treat it as mildly toxic and verify with your vet.
Growth habit: Bushy, somewhat sprawling evergreen subshrub with arching, slightly twiggy stems that form a rounded clump. Tends to grow leggy with age; regular pinching and pruning keeps it compact and encourages more of the drooping bract-spikes.
Watch for — Bracts fade to pale or greenish: Too little light dulls the signature shrimp colouring, while scorching midday sun bleaches it. Aim for bright light with only gentle direct sun for the richest red-bronze bracts.
What fertiliser shrimp plant actually wants — and why
Shrimp 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 shrimp 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 shrimp 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 shrimp plant:
Feed every 4-6 weeks through spring and summer with a balanced liquid fertiliser (around 10-10-10), starting as new growth begins. Ease off in autumn and stop in winter while growth slows. Over-feeding produces lush foliage at the expense of bracts. Treat that as every 4-6 weeks 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 shrimp 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 shrimp plant
Half strength is the safe default for shrimp 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 shrimp plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the shrimp plant watering schedule.
Signs you are over-feeding shrimp plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for shrimp plant:
- 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.
Signs you are under-feeding shrimp plant
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full shrimp plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of shrimp 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 shrimp 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 shrimp plant — frequently asked questions
What fertiliser does shrimp 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. Shrimp 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 shrimp plant?
Feed every 4-6 weeks through spring and summer with a balanced liquid fertiliser (around 10-10-10), starting as new growth begins. Ease off in autumn and stop in winter while growth slows. Over-feeding produces lush foliage at the expense of bracts. Feed every 4-6 weeks through spring and summer with a balanced liquid fertiliser (around 10-10-10), starting as new growth begins. Ease off in autumn and stop in winter while growth slows. Over-feeding produces lush foliage at the expense of bracts. Treat that as every 4-6 weeks 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 shrimp plant?
Half strength is the safe default for shrimp plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding shrimp 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 shrimp 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 shrimp plant?
Flush the pot of shrimp 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.
Keep reading
- Shrimp Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water shrimp plant — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise peace lily
- How to fertilise bird of paradise
- How to fertilise hoya
- All 609 fertilising guides in the Growli library