Fertilising guide
How to fertilise Ipomoea quamoclit (Ipomoea quamoclit)— schedule & NPK
Also called cypress vine, cardinal creeper, hummingbird vine.
More about ipomoea quamoclit
About Ipomoea quamoclit
Ipomoea quamoclit · also called cypress vine, cardinal creeper · flowering
Cypress vine is a delicate annual climber from tropical America with feathery, fern-like foliage and small, star-shaped scarlet (sometimes white) flowers that draw hummingbirds and butterflies all summer. Its finely divided leaves set it apart from broad-leaved morning glories. Fast and easy from seed, it twines daintily up netting or strings to make a lacy, flower-studded screen.
Growth habit: Twining herbaceous annual climber of slender, delicate habit; lighter and less rampant than common morning glory, with characteristic threadlike, pinnately divided leaves.
Watch for — Few flowers, lots of foliage: Too much shade or over-rich soil. Site in full sun and avoid nitrogen feeding to encourage the star-shaped blooms.
What fertiliser ipomoea quamoclit actually wants — and why
Ipomoea quamoclit 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 ipomoea quamoclit: 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 ipomoea quamoclit, 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 ipomoea quamoclit:
Feed lightly or not at all. Rich feeding produces lush ferny growth with few flowers. A single low-nitrogen feed at planting is sufficient in most soils. 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 ipomoea quamoclit 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 ipomoea quamoclit
Half strength is the safe default for ipomoea quamoclit — 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 ipomoea quamoclit first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the ipomoea quamoclit watering schedule.
Signs you are over-feeding ipomoea quamoclit
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for ipomoea quamoclit:
- 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 ipomoea quamoclit
- 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 ipomoea quamoclit care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of ipomoea quamoclit 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 ipomoea quamoclit
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 ipomoea quamoclit — frequently asked questions
What fertiliser does ipomoea quamoclit 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. Ipomoea quamoclit 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 ipomoea quamoclit?
Feed lightly or not at all. Rich feeding produces lush ferny growth with few flowers. A single low-nitrogen feed at planting is sufficient in most soils. Feed lightly or not at all. Rich feeding produces lush ferny growth with few flowers. A single low-nitrogen feed at planting is sufficient in most soils. 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 ipomoea quamoclit?
Half strength is the safe default for ipomoea quamoclit — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding ipomoea quamoclit 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 ipomoea quamoclit 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 ipomoea quamoclit?
Flush the pot of ipomoea quamoclit 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
- Ipomoea quamoclit care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water ipomoea quamoclit — 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 3899 fertilising guides in the Growli library