Fertilising guide
How to fertilise Strobilanthes auriculata var. dyeriana (Strobilanthes auriculata var. dyeriana)— schedule & NPK
Also called Royal purple plant, Persian shield.
More about strobilanthes auriculata var. dyeriana
About Strobilanthes auriculata var. dyeriana
Strobilanthes auriculata var. dyeriana · also called Royal purple plant, Persian shield · tropical
Persian shield is a tropical Southeast Asian sub-shrub grown for iridescent purple-silver lance-shaped leaves veined in dark green. It thrives in warm, humid bright-indirect light and rich, evenly moist soil. Foliage colour intensifies with light but scorches in harsh sun. Often treated as an annual or houseplant outside the tropics, refreshed yearly from easy cuttings.
Growth habit: Soft-stemmed evergreen sub-shrub with an upright, bushy, somewhat sprawling habit; pinch tips regularly to keep it dense and prevent legginess.
What fertiliser strobilanthes auriculata var. dyeriana actually wants — and why
Strobilanthes auriculata var. dyeriana 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 strobilanthes auriculata var. dyeriana: 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 strobilanthes auriculata var. dyeriana, 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 strobilanthes auriculata var. dyeriana:
Feed every 2-4 weeks through spring and summer with a balanced liquid houseplant feed at half strength to fuel fast leafy growth. Stop feeding in autumn and winter when growth slows. Treat that as every 2-4 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 strobilanthes auriculata var. dyeriana 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 strobilanthes auriculata var. dyeriana
Half strength is the safe default for strobilanthes auriculata var. dyeriana — 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 strobilanthes auriculata var. dyeriana first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the strobilanthes auriculata var. dyeriana watering schedule.
Signs you are over-feeding strobilanthes auriculata var. dyeriana
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for strobilanthes auriculata var. dyeriana:
- 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 strobilanthes auriculata var. dyeriana
- 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 strobilanthes auriculata var. dyeriana care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of strobilanthes auriculata var. dyeriana 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 strobilanthes auriculata var. dyeriana
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 strobilanthes auriculata var. dyeriana — frequently asked questions
What fertiliser does strobilanthes auriculata var. dyeriana 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. Strobilanthes auriculata var. dyeriana 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 strobilanthes auriculata var. dyeriana?
Feed every 2-4 weeks through spring and summer with a balanced liquid houseplant feed at half strength to fuel fast leafy growth. Stop feeding in autumn and winter when growth slows. Feed every 2-4 weeks through spring and summer with a balanced liquid houseplant feed at half strength to fuel fast leafy growth. Stop feeding in autumn and winter when growth slows. Treat that as every 2-4 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 strobilanthes auriculata var. dyeriana?
Half strength is the safe default for strobilanthes auriculata var. dyeriana — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding strobilanthes auriculata var. dyeriana 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 strobilanthes auriculata var. dyeriana 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 strobilanthes auriculata var. dyeriana?
Flush the pot of strobilanthes auriculata var. dyeriana 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
- Strobilanthes auriculata var. dyeriana care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water strobilanthes auriculata var. dyeriana — 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 monstera
- How to fertilise pothos
- How to fertilise fiddle leaf fig
- All 1284 fertilising guides in the Growli library