Fertilising guide

How to fertilise Tropaeolum majus 'Jewel of Africa' (Tropaeolum majus 'Jewel of Africa')— schedule & NPK

Also called Jewel of Africa Nasturtium, Variegated Nasturtium.

More about tropaeolum majus 'jewel of africa'

About Tropaeolum majus 'Jewel of Africa'

Tropaeolum majus 'Jewel of Africa' · also called Jewel of Africa Nasturtium, Variegated Nasturtium · flowering

'Jewel of Africa' is a climbing, variegated nasturtium with cream-marbled foliage and a mix of yellow, red, cream and peach trumpet flowers. Vigorous and easy, this fast-growing annual scrambles up supports or trails from containers. Both flowers and peppery leaves are edible. It thrives on neglect and poor soil, flowering best when not over-fed or overwatered.

Growth habit: Vigorous climbing and trailing habit, scrambling 1.5-2 m up trellis and netting or cascading from baskets, with rounded variegated leaves.

Watch for — All leaves, few flowers: Caused by soil that is too rich or too much feed and water. Grow in lean soil, withhold fertiliser, and water moderately to trigger flowering.

What fertiliser tropaeolum majus 'jewel of africa' actually wants — and why

Tropaeolum majus 'Jewel of Africa' is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom.

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 tropaeolum majus 'jewel of africa': 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 tropaeolum majus 'jewel of africa', 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 tropaeolum majus 'jewel of africa':

Do not feed routinely. Nasturtiums flower best in lean soil; excess fertiliser, especially nitrogen, produces abundant foliage and few flowers. At most, an occasional very dilute high-potash feed in containers. For a hungry bloomer that means feeding regularly — sparingly through the growing season — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

The dormant-season rule matters more than the exact interval: skip feeding entirely when tropaeolum majus 'jewel of africa' 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 tropaeolum majus 'jewel of africa'

Follow the flowering-feed label rate for tropaeolum majus 'jewel of africa', or half strength if feeding very frequently. These plants genuinely use the nutrients — under-feeding shows up fast as a thin display.

Feeding always goes onto already-damp soil, never dry roots — water tropaeolum majus 'jewel of africa' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the tropaeolum majus 'jewel of africa' watering schedule.

Signs you are over-feeding tropaeolum majus 'jewel of africa'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for tropaeolum majus 'jewel of africa':

Lots of lush leaves but few flowers (too much nitrogen).
Scorched leaf edges and salt crust from too-strong or too-frequent feeds.
Soft, sappy growth prone to aphids and mildew.

Signs you are under-feeding tropaeolum majus 'jewel of africa'

Sparse, small, short-lived flowers and pale foliage.
A tired plant that stops blooming early in the season.
Weak growth and poor repeat-flowering after the first flush.

If the symptoms point at watering, light or roots rather than nutrition, the full tropaeolum majus 'jewel of africa' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown tropaeolum majus 'jewel of africa' accumulates feed salts fast with frequent feeding — water until it drains each time and flush pots with plain water every few weeks to prevent scorch.

Organic vs synthetic feeds for tropaeolum majus 'jewel of africa'

Organic options

A liquid comfrey or seaweed feed (naturally potassium-rich) plus compost or well-rotted manure as a mulch. UK: comfrey feed, organic Tomorite, or rose feed; US: Espoma Rose-tone or Neptune's Harvest. Feeds and improves soil.

Synthetic / liquid feeds

A high-potash flowering feed on a regular cadence — UK: Tomorite (Levington), Phostrogen or a specialist rose feed; US: Miracle-Gro Bloom Booster or a rose food. Fast, reliable bloom response.

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 tropaeolum majus 'jewel of africa' — frequently asked questions

What fertiliser does tropaeolum majus 'jewel of africa' need?

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom. Tropaeolum majus 'Jewel of Africa' is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

How often should I feed tropaeolum majus 'jewel of africa'?

Do not feed routinely. Nasturtiums flower best in lean soil; excess fertiliser, especially nitrogen, produces abundant foliage and few flowers. At most, an occasional very dilute high-potash feed in containers. Do not feed routinely. Nasturtiums flower best in lean soil; excess fertiliser, especially nitrogen, produces abundant foliage and few flowers. At most, an occasional very dilute high-potash feed in containers. For a hungry bloomer that means feeding regularly — sparingly through the growing season — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

What strength of feed for tropaeolum majus 'jewel of africa'?

What does over-feeding tropaeolum majus 'jewel of africa' look like?

Lots of lush leaves but few flowers (too much nitrogen). Scorched leaf edges and salt crust from too-strong or too-frequent feeds. Soft, sappy growth prone to aphids and mildew. Using a high-nitrogen general feed on tropaeolum majus 'jewel of africa' is the headline mistake — you grow a big leafy plant with few flowers. The second is simply under-feeding a genuinely hungry bloomer and getting a sparse, short display.

Should I flush the soil of tropaeolum majus 'jewel of africa'?