Getting it to bloom

Why won't my Tassel Grape Hyacinth bloom? (and how to make it flower)

Also called Tassel Grape Hyacinth, Feather Hyacinth, Plumed Grape Hyacinth, Tassel Hyacinth (Muscari comosum).

More about tassel grape hyacinth

About Tassel Grape Hyacinth

Muscari comosum · also called Tassel Grape Hyacinth, Feather Hyacinth · flowering

Muscari comosum is a strikingly unusual grape hyacinth producing open spikes of olive-brown fertile flowers topped by a vivid purple tassel of sterile florets, giving it a distinctly shaggy appearance. The cultivar 'Plumosum' (feather hyacinth) takes this to an extreme of fine filamentous purple threads. Toxic to dogs and cats following Muscari genus classification.

Plant type: flowering

Watch for — Poor flower development: Caused by excessive shade or overly rich soil. Move to a sunnier, leaner position; do not overfeed.

The reasons tassel grape hyacinth isn't blooming

Almost every non-blooming tassel grape hyacinth 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 tassel grape hyacinth 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 tassel grape hyacinth to flower

Maximise sun. Give tassel grape hyacinth 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 tassel grape hyacinth and get the feeding right with the tassel grape hyacinth 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

Tassel Grape Hyacinth 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 tassel grape hyacinth care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Tassel Grape Hyacinth blooming — frequently asked questions

Why won't my tassel grape hyacinth flower?

Tassel Grape Hyacinth 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 tassel grape hyacinth bloom?

Give tassel grape hyacinth 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 tassel grape hyacinth normally bloom?