Getting it to bloom
Why won't my Leucanthemum × superbum 'Wirral Supreme' bloom? (and how to make it flower)
Also called Wirral Supreme Shasta daisy, double Shasta daisy (Leucanthemum × superbum 'Wirral Supreme').
More about leucanthemum × superbum 'wirral supreme'
About Leucanthemum × superbum 'Wirral Supreme'
Leucanthemum × superbum 'Wirral Supreme' · also called Wirral Supreme Shasta daisy, double Shasta daisy · flowering
Leucanthemum × superbum 'Wirral Supreme' is a classic double-flowered Shasta daisy, producing fully double, anemone-form white blooms with a small frilled centre from early to late summer. An RHS Award of Garden Merit holder, it is reliable and long-lived. It thrives in full sun and well-drained soil, and the heavy double heads benefit from some support.
Plant type: flowering
Watch for — Flopping double heads: The heavy double flowers weigh stems down, especially after rain. Provide a grow-through support early in the season or grow among sturdier neighbours.
The reasons leucanthemum × superbum 'wirral supreme' isn't blooming
Almost every non-blooming leucanthemum × superbum 'wirral supreme' 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 leucanthemum × superbum 'wirral supreme' 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 leucanthemum × superbum 'wirral supreme' to flower
- Maximise sun. Give leucanthemum × superbum 'wirral supreme' 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 leucanthemum × superbum 'wirral supreme' and get the feeding right with the leucanthemum × superbum 'wirral supreme' 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
Leucanthemum × superbum 'Wirral Supreme' 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 leucanthemum × superbum 'wirral supreme' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.
Leucanthemum × superbum 'Wirral Supreme' blooming — frequently asked questions
Why won't my leucanthemum × superbum 'wirral supreme' flower?
Leucanthemum × superbum 'Wirral Supreme' 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 leucanthemum × superbum 'wirral supreme' bloom?
Give leucanthemum × superbum 'wirral supreme' 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 leucanthemum × superbum 'wirral supreme' normally bloom?
Leucanthemum × superbum 'Wirral Supreme' 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 leucanthemum × superbum 'wirral supreme' 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 leucanthemum × superbum 'wirral supreme' flowering?
Feeding leucanthemum × superbum 'wirral supreme' a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
Keep reading
- Leucanthemum × superbum 'Wirral Supreme' care — the full brief (light, water, humidity, problems, pet safety)
- Leucanthemum × superbum 'Wirral Supreme' light needs — usually the first thing to fix for flowers
- Leucanthemum × superbum 'Wirral Supreme' fertilising — the right feed for buds, not just leaves
- Should I water my plant? The simple check
- Why is my plant wilting? Wet vs dry
- Underwatered plant — signs and rehydration
- Why won't my peace lily bloom?
- Why won't my jade plant bloom?
- Why won't my tomato bloom?
- All 2023 bloom guides in the Growli library