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Fertilising guide

How to fertilise Zantedeschia 'Captain Safari' (Zantedeschia 'Captain Safari')— schedule & NPK

Also called Captain Safari calla lily, orange captain calla.

More about zantedeschia 'captain safari'

About Zantedeschia 'Captain Safari'

Zantedeschia 'Captain Safari' · also called Captain Safari calla lily, orange captain calla · flowering

Zantedeschia 'Captain Safari' is a compact Captain-series hybrid calla lily noted for its warm apricot-to-orange spathes, sometimes flushed with deeper tones, above glossy spotted foliage. A tender tuberous perennial, it blooms through summer then rests as a dry rhizome over winter. Its bold colour and neat habit make it excellent for containers, summer borders and cut arrangements.

Growth habit: Compact, clump-forming tuberous (rhizomatous) perennial; deciduous, dying back to a rhizome each winter and re-emerging in spring.

Watch for — Poor flowering: Too little light or too much nitrogen leads to leaves but few spathes. Increase light and switch to a higher-potassium feed.

What fertiliser zantedeschia 'captain safari' actually wants — and why

Zantedeschia 'Captain Safari' 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 zantedeschia 'captain safari': 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 zantedeschia 'captain safari', 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 zantedeschia 'captain safari':

Feed every 2-3 weeks during growth and flowering with a balanced to potassium-rich liquid fertiliser for the best blooms, then stop as the plant dies back for dormancy. Treat that as every 2-3 weeks 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 zantedeschia 'captain safari' 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 zantedeschia 'captain safari'

Half strength is the safe default for zantedeschia 'captain safari' — 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 zantedeschia 'captain safari' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the zantedeschia 'captain safari' watering schedule.

Signs you are over-feeding zantedeschia 'captain safari'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for zantedeschia 'captain safari':

Signs you are under-feeding zantedeschia 'captain safari'

If the symptoms point at watering, light or roots rather than nutrition, the full zantedeschia 'captain safari' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Flush the pot of zantedeschia 'captain safari' 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 zantedeschia 'captain safari'

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 zantedeschia 'captain safari' — frequently asked questions

What fertiliser does zantedeschia 'captain safari' 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. Zantedeschia 'Captain Safari' 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 zantedeschia 'captain safari'?

Feed every 2-3 weeks during growth and flowering with a balanced to potassium-rich liquid fertiliser for the best blooms, then stop as the plant dies back for dormancy. Feed every 2-3 weeks during growth and flowering with a balanced to potassium-rich liquid fertiliser for the best blooms, then stop as the plant dies back for dormancy. Treat that as every 2-3 weeks 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 zantedeschia 'captain safari'?

Half strength is the safe default for zantedeschia 'captain safari' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding zantedeschia 'captain safari' 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 zantedeschia 'captain safari' 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 zantedeschia 'captain safari'?

Flush the pot of zantedeschia 'captain safari' 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.

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