Getting it to bloom

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

Also called Sum and Substance Hosta, Giant Gold Hosta, Plantain Lily (Hosta 'Sum and Substance').

More about hosta 'sum and substance'

About Hosta 'Sum and Substance'

Hosta 'Sum and Substance' · also called Sum and Substance Hosta, Giant Gold Hosta · flowering

Hosta 'Sum and Substance' is one of the largest hosta cultivars, producing enormous chartreuse-to-golden leaves up to 60 cm across in a bold clump. Pale lavender flowers appear in summer. It tolerates more sun than most hostas. The entire genus Hosta is toxic to cats, dogs, and horses.

Plant type: flowering

The reasons hosta 'sum and substance' isn't blooming

Almost every non-blooming hosta 'sum and substance' 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 hosta 'sum and substance' 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 'sum and substance' to flower

Maximise sun. Give hosta 'sum and substance' 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 hosta 'sum and substance' and get the feeding right with the hosta 'sum and substance' 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 'Sum and Substance' 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 'sum and substance' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Hosta 'Sum and Substance' blooming — frequently asked questions

Why won't my hosta 'sum and substance' flower?

Hosta 'Sum and Substance' 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 'sum and substance' bloom?

Give hosta 'sum and substance' 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 'sum and substance' normally bloom?