Getting it to bloom

Why won't my Sibthorp's Everlasting bloom? (and how to make it flower)

Also called Sibthorp's Everlasting (Helichrysum sibthorpii).

More about sibthorp's everlasting

About Sibthorp's Everlasting

Helichrysum sibthorpii · also called Sibthorp's Everlasting · flowering

Helichrysum sibthorpii is a rare endemic perennial found only in limestone cliff crevices on Mount Athos in north-east Greece, where it is a legally protected species under the EU Habitats Directive. In cultivation it forms a low, cushion-like mound of silver-grey, woolly foliage and produces papery yellow everlasting flowerheads in summer. Like all Mediterranean helichrysums, it demands perfectly drained, lean soil in full sun and cannot tolerate wet winters. It is not listed by the ASPCA; classified as mildly-toxic on precautionary grounds.

Plant type: flowering

The reasons sibthorp's everlasting isn't blooming

Almost every non-blooming sibthorp's everlasting 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 sibthorp's everlasting 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 sibthorp's everlasting to flower

Maximise sun. Give sibthorp's everlasting 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 sibthorp's everlasting and get the feeding right with the sibthorp's everlasting 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

Sibthorp's Everlasting 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 sibthorp's everlasting care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Sibthorp's Everlasting blooming — frequently asked questions

Why won't my sibthorp's everlasting flower?

Sibthorp's Everlasting 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 sibthorp's everlasting bloom?

Give sibthorp's everlasting 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 sibthorp's everlasting normally bloom?