Aeonium flowers: what to expect

Seeing your Aeonium burst into flower for the first time is a special moment, and those bold, cone-shaped flower heads can come as a real surprise. Flowering also raises a few questions. Why is this happening? What do I do next? Does flowering mean my plant is dying?

What do Aeonium flowers look like?

Each flowering rosette produces a large, conical flower spike (sometimes called a panicle) that can grow anywhere from 15 cm to over 60 cm taller than the original plant, depending on the variety. The spike is covered in hundreds of small, star-shaped blooms. These are usually yellow, though some varieties have white or pale pink flowers, and Aeonium nobile, in the header photo, has red ones.

The flowers are full of nectar and attract bees, butterflies and other pollinators, so a flowering Aeonium is well worth having in a wildlife-friendly garden or outdoor space. The display can last anywhere from a few weeks to several months, working its way up the spike as the lower blooms fade and the upper ones open.

When do Aeoniums flower?

Aeoniums are winter growers. Their main growing season runs from autumn through to spring, and they grow whenever the weather is mild during that time. They usually flower in spring, often peaking between March and May in the UK, though the process can begin as early as November. The first sign you may notice is a rosette starting to stretch and change shape.

Not all Aeoniums flower every year, and some take several years to mature before producing their first flower spike. Growing conditions matter too: a happy, well-fed Aeonium in a sunny spot is far more likely to flower than one that has been stressed or neglected.

Monocarpic: what it means for your plant

Aeoniums are monocarpic, which means each rosette that flowers will die once it has finished blooming and setting seed. This is a natural part of the plant's life cycle and nothing to worry about.

Only the rosette that flowered will die, not the whole plant. If your Aeonium has several stems or branches, the other rosettes will carry on growing as normal.

Single-stemmed varieties, however, may die completely after flowering if the stem has put all of its energy into the flower. It is always worth keeping the stump, as it may grow again. If it turns hollow and dead, you can throw it away.

How to encourage flowering

There is no guaranteed way to force an Aeonium to flower, but you can give your plant the best possible conditions.

Aeoniums need plenty of bright light to grow well and flower. A spot outdoors in full sun or a very bright windowsill is ideal, and during the growing season, from autumn to spring, let your plant have as much light as you can.

Start feeding as growth picks up in late winter and early spring, every 10 to 14 days, with a balanced liquid fertiliser. This gives the plant the nutrients it needs to flower and makes for a bigger, longer-lasting display.

Water regularly during the growing season and let the compost dry out between waterings. Avoid waterlogging, which can stress the plant and hold back flowering. Ease off in summer, when Aeoniums go dormant and naturally slow down.

Young plants need time. Aeoniums usually have to reach a certain maturity before they will flower.

What to do after flowering

The rosette that produced the flowers will gradually die back once they fade.

While the plant is in flower, enjoy the display and leave the spike in place for the bees and other beneficial insects. There is no need to deadhead individual flowers.

When all the flowers have faded and the spike starts to dry out and turn brown, you can cut it back to the base of the stem. The flower stem would die back on its own eventually, but removing it early keeps the plant looking tidy.

If you want to try growing from seed, let the flower spike dry fully and set seed before you remove it. Tap the dried seed heads over a piece of paper to collect the tiny seeds, then sow them on the surface of a fine, well-draining compost mix in spring, when they germinate best.

If you have a multi-stemmed plant with rosettes that have not flowered, this is a good time to take cuttings from healthy side shoots. Let the cut end callus over for a day or two before potting it into dry compost. Cuttings let you keep a variety you love going and give you new plants for yourself or friends.

Which varieties are most likely to flower?

Every Aeonium species can flower, given the right conditions and enough time. Of the Aeoniums we grow, these are some of the most impressive in flower:

Aeonium 'Schwarzkopf' succulent with dark burgundy rosette petals and bright red-yellow glowing center in sunlight.

Aeonium 'Schwarzkopf' is perhaps the most dramatic of all, with bright yellow flower spikes rising from deep purple-black rosettes. It is at its best as a mature, multi-stemmed plant in full bloom.

Aeonium spathulatum is a vigorous, dwarf, shrub-like variety with yellow flowers. A plant with many branches can produce lots of flower spikes at the same time.

Aeonium 'Mardi Gras' has variegated deep pink and yellow rosettes and a soft yellow flower spike. It looks its best grown outdoors in a sunny position.

Aeonium 'Pomegranate' is a large-growing variety with big rosettes and bold flower spikes. It is the one to choose if you want maximum impact in the garden or in a large container.

Common flowering questions

My Aeonium has never flowered. Is something wrong?
Not at all. Some Aeoniums take longer to mature than others, and not every plant will flower every year. Keep giving it good light, regular watering in the growing season and a suitable feed, and it will flower when it is ready.

Can I prevent my Aeonium from flowering?
No, and you would not want to. Once a rosette has started to flower, there is no way to reverse the process. Enjoy the display and plan what comes next, whether that is taking cuttings or letting the plant set seed.

Will my Aeonium die after flowering?
The rosette that flowered will die, but not necessarily the whole plant. Multi-stemmed plants carry on growing from their other rosettes, and even single-stemmed plants may produce offsets from the base before or after the main rosette dies.

Should I deadhead the flowers?
There is no need. The flowers fade naturally, and you can remove the whole spent flower spike once flowering has finished. If you want to collect seed, leave the spike until it has fully dried.

My Aeonium's rosette has gone elongated and pointy. Is it unhealthy?
No. This is a normal early sign of flowering: the rosette changes shape as it begins to push up the flower spike.