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Getting it to bloom

Why won't my Hosta bloom? (and how to make it flower)

Also called Plantain lily, Funkia, Hosta lily (Hosta spp.).

More about hosta

About Hosta

Hosta spp. · also called Plantain lily, Funkia · flowering

Hosta (plantain lily) is a hardy shade-loving foliage perennial grown in borders and pots, with lily-like flowers on tall scapes in summer. It is mildly toxic to pets: the ASPCA lists Hosta as toxic to cats, dogs and horses because saponins cause vomiting, diarrhoea and depression. Keep nibbling pets away from plantings.

Plant type: flowering

The reasons hosta isn't blooming

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

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

Feeding hosta 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 hosta to flower

  1. Maximise sun. Give hosta the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers.
  2. Switch the feed. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
  3. Deadhead regularly. Remove spent flowers often to keep it producing more rather than stopping to set seed.
  4. 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 hosta and get the feeding right with the hosta 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

Hosta 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 hosta care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Hosta blooming — frequently asked questions

Why won't my hosta flower?

Hosta 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 hosta bloom?

Give hosta 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 hosta normally bloom?

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

What should I do with hosta after it flowers?

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.

What is the single biggest mistake stopping hosta flowering?

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

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