Gadenin日本語Get the appThe flowers open and close, and that is by design
A gazania flower is not a fixed object. The ray florets fold up into a narrow closed cone at dusk, on overcast days, and any time the plant sits in shade, then spread flat again when strong sun hits it the following morning. In good weather the cycle runs day after day for a week or more on a single flower before it finally goes over. It is the same mechanism many daisy-family plants from open sunny habitats use, and it protects the pollen from damp and cold nights.
Because of that, the same plant can look spectacular at noon and dead at seven in the evening. If you plant gazania where you only see the garden after work, you will barely see it flower. This is worth thinking about before you decide where to put it: a bed you pass in the morning, or one visible from a window at midday, gives you far more value than a patio you use only in the evening.
Cool, dull weather stretches the closed period. Through a run of gray wet days the flowers may not open at all, and the plant looks like a mound of leaves with brown-backed buds sitting on it. Nothing is wrong. The first bright morning after the weather clears will open them all again.
Flowers that never open even in bright midday sun mean the plant is not getting enough direct light, not that the plant is sick. Move it, or accept a leafy plant with no display.
Light and heat are the whole answer
Gazania needs at least six hours of unobstructed direct sun to flower properly, and it performs best with eight or more plus reflected heat from paving, gravel or a wall. In those conditions a healthy plant carries flowers continuously from early summer to the first hard frost. Drop it to four hours and the plant survives but the flowers open late in the morning, shut early in the afternoon, and come in far smaller numbers.
Watch how the light on a spot changes through the season, not just on the day you plant. A bed that is open and bright in mid-spring can be substantially shaded by midsummer once nearby shrubs, perennials or a deciduous tree have filled out. Gazanias that started well and then quietly stopped flowering by high summer have very often been shaded out by their neighbors rather than by any change in their own health.
Container plants have an advantage here: you can move them. If a pot is not opening well, shift it to the hottest, most exposed position you have and watch for a week. The response is fast, usually visible within a few bright days.
When a plant makes leaves but not flowers
A gazania with a big, lush, dark green rosette and few or no buds is almost always over-fed, over-watered or both. Nitrogen and steady moisture push leaf growth, and this plant only turns to heavy flowering when it is somewhat stressed by heat and dryness. The fix is to stop feeding entirely, cut watering back hard, and wait. It generally takes two to three weeks of lean treatment before buds start to appear.
The other common cause is age within the season. A plant that has flowered continuously for two or three months and has not been deadheaded runs out of momentum, sets seed and takes a long pause. Regular deadheading prevents this, and a hard trim in late summer rescues a plant that has already stalled.
Very occasionally the problem is planting depth. If the crown was buried when the plant went in, the rosette sits wet and the plant sulks rather than flowering. Scrape the soil back so the crown sits just at or slightly above the surface.
| What you see | Most likely cause | What to do |
|---|---|---|
| Buds present but never open | Fewer than about 5-6 hours direct sun | Move the plant or the pot to full sun |
| Flowers open late, close early | Marginal light, or a cool dull spell | Wait for clear weather; move if it repeats |
| Lots of leaf, no buds | Too much nitrogen and water | Stop feeding, water far less, wait 2-3 weeks |
| Flowering stopped in high summer | Seed set from missed deadheading | Remove all seed heads, trim back by a third |
| Sparse flowers on long floppy stems | Crowding and shade from neighbors | Cut back neighbors or lift and move in autumn |
| Plant fine, no flowers at all in year one | Very rich soil, or very late planting | Leave lean and unfed; expect a better second season |
Keeping the display going until frost
The routine that produces a long season is simple and unglamorous: deadhead every three or four days, cutting the stalk right down at the base of the rosette; water only when the plant genuinely needs it; and give nothing more than a single light feed early in the season. Skip the deadheading for a fortnight in high summer and you will see the flower count drop.
In late summer, when plants have spread and gone open in the middle, cut the whole plant back by roughly a third and clear out any bare or dead stems from the center. This looks drastic for about ten days and then produces a compact flush of new growth with a fresh wave of flowers running into autumn. Do it while there are still six to eight weeks of decent weather ahead, so the new growth has time to bud up.
When the first frost blackens the plant, the outdoor season is over. Anywhere the winter low stays above roughly 25F (-4C), the crown may come through and resprout in spring, and cutting the old growth back and keeping it dry through winter improves those odds.
What to record about flowering
Log the date of the first fully open flower and the date flowering finally stopped, and next to them write the position of the plant. Over two seasons this shows you plainly which spots in your garden give a four-month display and which give six weeks, and it is far more reliable than your memory of how things looked.
It is also worth noting the date of your late-summer cut-back and how long it took for the new flush to open, because that tells you how early you have to do it in your climate for the second wave to be worth having. If you kept a plant over winter from cuttings, record whether the overwintered plant flowered earlier than a fresh spring-bought one; it usually does, and by a useful margin.