Fertilising guide
How to fertilise Neoregelia concentrica (Neoregelia concentrica)— schedule & NPK
Also called bullseye bromeliad, purple star neoregelia.
More about neoregelia concentrica
About Neoregelia concentrica
Neoregelia concentrica · also called bullseye bromeliad, purple star neoregelia · tropical
Neoregelia concentrica is a large, flat tank bromeliad famous for the deep purple-to-violet flush that floods its broad central cup at flowering, ringed by spine-edged leaves spotted with dark maroon, the bullseye pattern. Tiny lavender flowers nestle in the cup. A bold, architectural specimen for bright interiors and a popular parent of many hybrids.
Growth habit: Large stemless rosette with broad, flat, spreading leaves; produces basal pups after the parent flowers.
Watch for — Brown leaf tips: Low humidity or hard, salty water burns the tips; raise humidity and switch to rain or distilled water.
What fertiliser neoregelia concentrica actually wants — and why
Neoregelia concentrica 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 neoregelia concentrica: 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 neoregelia concentrica, 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 neoregelia concentrica:
Light feeder: apply quarter- to half-strength balanced liquid fertiliser to the mix monthly in spring and summer. Keep fertiliser out of the cup, where salt concentration can scorch the prized central crown. Treat that as monthly 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 neoregelia concentrica 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 neoregelia concentrica
Half strength is the safe default for neoregelia concentrica — 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 neoregelia concentrica first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the neoregelia concentrica watering schedule.
Signs you are over-feeding neoregelia concentrica
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for neoregelia concentrica:
- 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 neoregelia concentrica
- 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 neoregelia concentrica care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of neoregelia concentrica 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 neoregelia concentrica
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 neoregelia concentrica — frequently asked questions
What fertiliser does neoregelia concentrica 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. Neoregelia concentrica 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 neoregelia concentrica?
Light feeder: apply quarter- to half-strength balanced liquid fertiliser to the mix monthly in spring and summer. Keep fertiliser out of the cup, where salt concentration can scorch the prized central crown. Light feeder: apply quarter- to half-strength balanced liquid fertiliser to the mix monthly in spring and summer. Keep fertiliser out of the cup, where salt concentration can scorch the prized central crown. Treat that as monthly 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 neoregelia concentrica?
Half strength is the safe default for neoregelia concentrica — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding neoregelia concentrica 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 neoregelia concentrica 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 neoregelia concentrica?
Flush the pot of neoregelia concentrica 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
- Neoregelia concentrica care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water neoregelia concentrica — 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 3899 fertilising guides in the Growli library