Fertilising guide
How to fertilise Field Bindweed (Convolvulus arvensis)— schedule & NPK
Also called Field Bindweed, Creeping Jenny, Cornbind, Wild Morning Glory.
More about field bindweed
About Field Bindweed
Convolvulus arvensis · also called Field Bindweed, Creeping Jenny · flowering
Field Bindweed is a vigorous, deep-rooted perennial vine native to Europe and Asia, naturalised worldwide as a persistent arable and garden weed. It spreads via an extensive network of fleshy white rhizomes that can penetrate to 2 m depth, making eradication notoriously difficult. Small, funnel-shaped flowers in white to pale pink appear from June to September and are attractive to bees and hoverflies. The sap and plant material are toxic to cats and dogs.
Growth habit: Twining and creeping perennial vine with extensive deep rhizome system; stems trail and twine over other plants, reaching several metres in a season.
What fertiliser field bindweed actually wants — and why
Field Bindweed 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 field bindweed: 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 field bindweed, 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 field bindweed:
Do not fertilise; additional nutrients accelerate spread. Management rather than cultivation is the appropriate approach to this species in garden settings. 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 field bindweed 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 field bindweed
Half strength is the safe default for field bindweed — 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 field bindweed first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the field bindweed watering schedule.
Signs you are over-feeding field bindweed
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for field bindweed:
- 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 field bindweed
- 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 field bindweed care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of field bindweed 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 field bindweed
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 field bindweed — frequently asked questions
What fertiliser does field bindweed 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. Field Bindweed 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 field bindweed?
Do not fertilise; additional nutrients accelerate spread. Management rather than cultivation is the appropriate approach to this species in garden settings. Do not fertilise; additional nutrients accelerate spread. Management rather than cultivation is the appropriate approach to this species in garden settings. 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 field bindweed?
Half strength is the safe default for field bindweed — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding field bindweed 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 field bindweed 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 field bindweed?
Flush the pot of field bindweed 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
- Field Bindweed care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water field bindweed — 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 sioux blue indian grass
- How to fertilise frost grass
- How to fertilise rice cutgrass
- All 10153 fertilising guides in the Growli library