Getting it to bloom

Why won't my Hardy Geranium 'Rozanne' bloom? (and how to make it flower)

Also called Rozanne cranesbill, Gerwat Rozanne (Geranium 'Rozanne').

More about hardy geranium 'rozanne'

About Hardy Geranium 'Rozanne'

Geranium 'Rozanne' · also called Rozanne cranesbill, Gerwat Rozanne · flowering

Geranium 'Rozanne' is an award-winning hardy cranesbill famous for an exceptionally long season of large violet-blue, white-eyed flowers from early summer to autumn frost. It forms a spreading mound of marbled green leaves, weaves through borders and containers, and asks only for sun to part shade and decent drainage. A near-effortless, sterile, ground-covering perennial.

Plant type: flowering

Watch for — Mid-season sprawl and bare centre: After the first flush the mound can open up and look tired. Shear the whole plant back by about a third in midsummer to trigger a fresh, compact flush of foliage and flower.

The reasons hardy geranium 'rozanne' isn't blooming

Almost every non-blooming hardy geranium 'rozanne' 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 hardy geranium 'rozanne' 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 hardy geranium 'rozanne' to flower

Maximise sun. Give hardy geranium 'rozanne' 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 hardy geranium 'rozanne' and get the feeding right with the hardy geranium 'rozanne' 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

Hardy Geranium 'Rozanne' 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 hardy geranium 'rozanne' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Hardy Geranium 'Rozanne' blooming — frequently asked questions

Why won't my hardy geranium 'rozanne' flower?

Hardy Geranium 'Rozanne' 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 hardy geranium 'rozanne' bloom?

Give hardy geranium 'rozanne' 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 hardy geranium 'rozanne' normally bloom?