Fertilising guide
How to fertilise Queen Mix Spider Flower (Cleome hassleriana)— schedule & NPK
Also called Spider Flower, Spider Plant, Bee Plant, Rocky Mountain Bee Plant.
More about queen mix spider flower
About Queen Mix Spider Flower
Cleome hassleriana · also called Spider Flower, Spider Plant · flowering
Queen Mix Spider Flower is a tall, architectural annual with large, airy flower heads in rose, pink, lilac, and white atop sticky, thorny stems — a magnet for bees and butterflies. Vigorous self-seeder for back-of-border drama from midsummer to autumn. Mildly irritating sap; listed by the ASPCA as non-toxic to dogs and cats.
Growth habit: Tall, upright, branching annual
What fertiliser queen mix spider flower actually wants — and why
Queen Mix Spider Flower 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 queen mix spider flower: 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 queen mix spider flower, 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 queen mix spider flower:
Incorporate a balanced granular fertiliser at sowing or transplanting time. In moderately fertile soils further feeding is generally unnecessary. In poor soils, a monthly dilute balanced liquid feed through the growing season sustains the long flowering period. Avoid excessive nitrogen. 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 queen mix spider flower 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 queen mix spider flower
Half strength is the safe default for queen mix spider flower — 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 queen mix spider flower first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the queen mix spider flower watering schedule.
Signs you are over-feeding queen mix spider flower
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for queen mix spider flower:
- 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 queen mix spider flower
- 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 queen mix spider flower care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of queen mix spider flower 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 queen mix spider flower
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 queen mix spider flower — frequently asked questions
What fertiliser does queen mix spider flower 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. Queen Mix Spider Flower 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 queen mix spider flower?
Incorporate a balanced granular fertiliser at sowing or transplanting time. In moderately fertile soils further feeding is generally unnecessary. In poor soils, a monthly dilute balanced liquid feed through the growing season sustains the long flowering period. Avoid excessive nitrogen. Incorporate a balanced granular fertiliser at sowing or transplanting time. In moderately fertile soils further feeding is generally unnecessary. In poor soils, a monthly dilute balanced liquid feed through the growing season sustains the long flowering period. Avoid excessive nitrogen. 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 queen mix spider flower?
Half strength is the safe default for queen mix spider flower — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding queen mix spider flower 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 queen mix spider flower 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 queen mix spider flower?
Flush the pot of queen mix spider flower 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
- Queen Mix Spider Flower care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water queen mix spider flower — 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 rhododendron 'catawbiense boursault'
- How to fertilise rhododendron 'pjm'
- How to fertilise rhododendron 'cunningham's white'
- All 11687 fertilising guides in the Growli library