Getting it to bloom

Why won't my Zinnia 'Benary's Giant' bloom? (and how to make it flower)

Also called Giant zinnia, Common zinnia (Zinnia elegans 'Benary's Giant').

More about zinnia 'benary's giant'

About Zinnia 'Benary's Giant'

Zinnia elegans 'Benary's Giant' · also called Giant zinnia, Common zinnia · flowering

'Benary's Giant' is a premium cut-flower zinnia bearing huge, fully double dahlia-form blooms up to 10-15 cm across on tall, sturdy stems. A heat-loving warm-season annual, it flowers prolifically from summer to frost in full sun, and the more you cut, the more it produces. Pet-safe and a magnet for butterflies and bees.

Plant type: flowering

Watch for — Hollow or weak stems for cutting: Stems cut too soon flop in the vase. Use the wiggle test, cutting only when the stem is firm and rigid near the bloom; harvesting often also strengthens later stems.

The reasons zinnia 'benary's giant' isn't blooming

Almost every non-blooming zinnia 'benary's giant' 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 zinnia 'benary's giant' 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 zinnia 'benary's giant' to flower

Maximise sun. Give zinnia 'benary's giant' 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 zinnia 'benary's giant' and get the feeding right with the zinnia 'benary's giant' 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

Zinnia 'Benary's Giant' 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 zinnia 'benary's giant' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Zinnia 'Benary's Giant' blooming — frequently asked questions

Why won't my zinnia 'benary's giant' flower?

Zinnia 'Benary's Giant' 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 zinnia 'benary's giant' bloom?

Give zinnia 'benary's giant' 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 zinnia 'benary's giant' normally bloom?