Fertilising guide
How to fertilise Weigela 'Red Prince' (Weigela 'Red Prince')— schedule & NPK
Also called Red Prince Weigela.
More about weigela 'red prince'
About Weigela 'Red Prince'
Weigela 'Red Prince' · also called Red Prince Weigela · flowering
A vigorous deciduous shrub producing bright true-red non-fading trumpet flowers in late spring, with a strong repeat bloom in mid-summer — one of the best re-bloomers in the genus. Mid-green foliage remains clean and disease-resistant through the season. Hardy and easy-care. Mildly-toxic as a precaution.
Growth habit: Upright arching deciduous shrub
What fertiliser weigela 'red prince' actually wants — and why
Weigela 'Red Prince' 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 weigela 'red prince': 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 weigela 'red prince', 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 weigela 'red prince':
Apply a balanced slow-release fertiliser in early spring. After the first bloom flush in late spring, a light feed with a high-potassium fertiliser (e.g. tomato feed diluted) helps fuel the midsummer repeat bloom. 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 weigela 'red prince' 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 weigela 'red prince'
Half strength is the safe default for weigela 'red prince' — 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 weigela 'red prince' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the weigela 'red prince' watering schedule.
Signs you are over-feeding weigela 'red prince'
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for weigela 'red prince':
- 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 weigela 'red prince'
- 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 weigela 'red prince' care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of weigela 'red prince' 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 weigela 'red prince'
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 weigela 'red prince' — frequently asked questions
What fertiliser does weigela 'red prince' 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. Weigela 'Red Prince' 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 weigela 'red prince'?
Apply a balanced slow-release fertiliser in early spring. After the first bloom flush in late spring, a light feed with a high-potassium fertiliser (e.g. tomato feed diluted) helps fuel the midsummer repeat bloom. Apply a balanced slow-release fertiliser in early spring. After the first bloom flush in late spring, a light feed with a high-potassium fertiliser (e.g. tomato feed diluted) helps fuel the midsummer repeat bloom. 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 weigela 'red prince'?
Half strength is the safe default for weigela 'red prince' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding weigela 'red prince' 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 weigela 'red prince' 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 weigela 'red prince'?
Flush the pot of weigela 'red prince' 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
- Weigela 'Red Prince' care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water weigela 'red prince' — 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 creeping snowberry
- How to fertilise wisley gaultheria
- How to fertilise new zealand snowberry
- All 11687 fertilising guides in the Growli library