Getting it to bloom

Why won't my Pink Calla Lily bloom? (and how to make it flower)

Also called Pink Calla Lily, Pink Arum, Rehmann's Calla (Zantedeschia rehmannii).

More about pink calla lily

About Pink Calla Lily

Zantedeschia rehmannii · also called Pink Calla Lily, Pink Arum · flowering

Zantedeschia rehmannii is the original pink calla lily native to eastern South Africa, producing slender, lance-shaped leaves and elegant funnel-shaped spathes in shades of soft pink to deep rose. It grows from rhizomes, thrives in moist to wet conditions, and suits containers, borders, and cutting gardens. Toxic to pets due to calcium oxalate; dies back to rhizome in winter.

Plant type: flowering

Watch for — Failure to flower: Insufficient sunlight, excessive nitrogen, or rhizomes planted too shallowly inhibit flowering. Plant rhizomes 5–8 cm deep, feed with high-potassium fertiliser, and ensure at least 4 hours of bright light daily.

The reasons pink calla lily isn't blooming

Almost every non-blooming pink calla lily traces back to one of these, roughly in order of how common they are:

Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.
Too much nitrogen feed, driving lush foliage at the expense of flowers (very common with general or lawn feeds).
The plant has not been deadheaded, so it stops flowering once it sets seed.
Irregular watering — drought or waterlogging at the budding stage makes buds abort.
It is still too young or was checked by a transplant and is rebuilding before flowering.

Feeding pink calla lily a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.

The fix — how to get pink calla lily to flower

Maximise sun. Give pink calla lily the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers.
Switch the feed. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
Deadhead regularly. Remove spent flowers often to keep it producing more rather than stopping to set seed.
Water consistently. Keep moisture even through budding and flowering — drought-then-flood swings make buds drop.

Light and feeding do most of the heavy lifting here. Dial in the spot with the light guide for pink calla lily and get the feeding right with the pink calla lily fertilising schedule — the wrong feed (too much nitrogen) is one of the most common silent reasons a healthy plant makes leaves instead of flowers.

Bloom season and what to expect

Pink Calla Lily flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.

Post-bloom care so it flowers again

Deadhead, keep feeding lightly, and many will rebloom; collect seed from the best plants at the end of the season if you want to grow them again.

For everything else this plant needs day to day, see the full pink calla lily care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Pink Calla Lily blooming — frequently asked questions

Why won't my pink calla lily flower?

Pink Calla Lily blooms on the season's growth given enough sun, warmth and the right feed — there is no cold or photoperiod trick, just good growing conditions and a bloom-leaning feed. The most common reason it is not happening: Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.

How do I make pink calla lily bloom?

Give pink calla lily the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.

When does pink calla lily normally bloom?