Getting it to bloom

Why won't my Miss Willmott's Ghost bloom? (and how to make it flower)

Also called Miss Willmott's Ghost, Giant Sea Holly, Silver Sea Holly (Eryngium giganteum).

More about miss willmott's ghost

About Miss Willmott's Ghost

Eryngium giganteum · also called Miss Willmott's Ghost, Giant Sea Holly · flowering

Eryngium giganteum is a monocarpic biennial or short-lived perennial native to the Caucasus and Iran, producing large, silvery-white bracts and blue-grey thimble flowers in its second or third year before dying. It thrives in full sun and well-drained, poor to moderately fertile soil, and will self-seed prolifically if the fading stems are left in place — the single most important care fact is to avoid rich or wet soil, which causes floppy growth and crown rot. Protect from winter wet. The genus Eryngium is not listed as toxic by ASPCA; considered non-toxic to cats and dogs.

Plant type: flowering

Watch for — Leaf and bud eelworm: Nematode infestation causes brown patches within leaves and distorted buds; remove and destroy affected growth — no chemical control is available.

The reasons miss willmott's ghost isn't blooming

Almost every non-blooming miss willmott's ghost 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 miss willmott's ghost 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 miss willmott's ghost to flower

Maximise sun. Give miss willmott's ghost 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 miss willmott's ghost and get the feeding right with the miss willmott's ghost 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

Miss Willmott's Ghost 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 miss willmott's ghost care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Miss Willmott's Ghost blooming — frequently asked questions

Why won't my miss willmott's ghost flower?

Miss Willmott's Ghost 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 miss willmott's ghost bloom?

Give miss willmott's ghost 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 miss willmott's ghost normally bloom?