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An aeonium's year is upside down compared with most succulents. Growth restarts in autumn as soon as the heat breaks, continues right through the winter, peaks in spring, and then stops when sustained heat arrives. The rosettes close into tight buds, the lower leaves are shed and the plant sits out the hottest weeks doing nothing at all. Every job in the calendar below is timed against those two switches.
The triggers are weather rather than dates, which is what makes this plant readable in any climate. Growth stops when days settle above about 86F (30C) and restarts when nights first turn cool. Cold sets the other boundary: the plant must be kept above 40F (4C) and cannot survive a freeze, so the autumn transition is both the start of the growing season and the moment plants come under cover.
| Season | What the plant is doing | Water | Main jobs |
|---|---|---|---|
| Early autumn | Waking up, rosettes reopening | Resume with a full soak once growth shows | Repot, take cuttings, tidy shed leaves |
| Late autumn | Growing steadily | Soak every 7 to 14 days when dry through | Move plants under cover before nights reach 40F (4C) |
| Winter | Main growing season | Soak when dry through, keep it up | Maximum light, turn pots, check for mealybug |
| Spring | Peak growth, some heads flowering | Soak every 7 to 10 days | Last window for repotting and cuttings, move outdoors after frost |
| Early summer | Slowing, rosettes closing | Taper to every 3 weeks, smaller amounts | Move to afternoon shade, stop all root disturbance |
| High summer | Fully at rest | Once a month at most, or none | Leave alone, watch the stem bases |
Autumn: the main working window
Once the heat has genuinely broken and the rosettes begin to open again, the plant is back in business and this is the best moment of the year for anything that disturbs roots. Repot pots whose mix has compacted, take and root cuttings from leggy stems, behead anything that has gone tall and bare, and clear away the pile of shed leaves that accumulated over summer. Give the first proper watering only after new growth is visible, not on the first cool day.
The other autumn job is the cold one, and it needs doing early rather than at the last minute. Any plant that summered outdoors has to come under cover before nights approach 40F (4C), and well before any chance of frost. Bring it in while it is dry, check the rosette centers and leaf joints for mealybug before it joins other plants, and give it the brightest position you have, because indoor winter light is the limiting factor for the whole growing season ahead.
Winter and spring: light, water, and watching for flowers
Winter is the growing season and the plant should be treated accordingly: watered whenever the mix dries through, given every hour of direct light available, and kept off cold windowsills where it can touch freezing glass overnight. Turn the pot a quarter every week or two or the plant will lean hard toward the light and set that lean permanently into the stem. Feed lightly if at all, at most a half-strength balanced liquid feed once a month while growth is visible.
Spring is the peak, and it is also when any flowering shows itself. A head that begins stretching upward into a long cone is going to flower and then die, so take cuttings from the plant's other branches while everything is still in good condition. Once the last frost has passed, plants can go back outside, moved into full sun over a fortnight rather than in one step. This is also the final window for repotting and cuttings before the rest arrives.
Summer: the season of doing nothing
When days settle above about 86F (30C) the plant closes down, and the whole job is to reduce demands on it. Move it out of the afternoon sun into bright shade, keep air moving around it, and cut watering back to a small drink once a month at most, judged by the stem rather than the leaves. Do not repot, do not take cuttings, do not feed and do not attempt to open the rosettes back up.
Expect the plant to look poor. Rosettes tight as buds, a heap of papery leaves on the surface of the pot, no new growth for six to eight weeks. All of it is normal and all of it reverses in autumn. The only genuine summer inspection is the stem base: press it monthly and make sure it is hard. A stem that gives under a fingertip in high summer is rotting from a watering that should not have happened, and the head needs cutting off and drying that same day.
Plants in the ground in a mild climate, and very large established specimens, rest less obviously than young plants in small pots. Judge each plant by its own rosettes rather than assuming every aeonium on the bench shuts down on the same week.
Five dates worth writing down
The calendar above is a general shape and your site will shift it by weeks in either direction. Five entries a year make it specific: the date the rosettes closed for summer, the date they reopened in autumn, the date you resumed normal watering, the date you moved plants under cover, and the lowest temperature they saw over the winter.
Add to those a note of which heads flowered and on which plant, and the date of any repot or cutting on a label in the pot. That is a couple of dozen entries a year and it settles the recurring questions. After one full cycle you will know your own dates for the two switches, and the pattern is almost always the same: the plants that did best were the ones tapered off early in summer and left alone through it.