Watering schedule
How often to water Hairy Stonecrop (Prometheum pilosum) — the schedule
Also called Hairy Stonecrop, Hairy Rosularia.
More about hairy stonecrop
About Hairy Stonecrop
Prometheum pilosum · also called Hairy Stonecrop, Hairy Rosularia · houseplant
A charming, miniature biennial (or short-lived perennial) succulent from the Caucasus Mountains and northeast Turkey, formerly classified as Sedum pilosum. It forms tight, hairy rosettes resembling a small Sempervivum, flowers in its second year, then dies — but produces offsets if conditions suit. Ideal for alpine troughs, gritty pans, and bright windowsills.
Ideal humidity: 20–40%
Watch for — Crown rot in wet or humid conditions: The hairy, dense rosette traps moisture and is highly susceptible to fungal rot. Ensure perfect drainage, a grit mulch around the crown, and good air circulation. Keep dry in winter.
The watering schedule, season by season
Hairy Stonecrop stores water in its thick leaves and stems, so when in doubt, wait — it survives drought far better than soggy soil. The base rhythm for hairy stonecrop is every 2–3 weeks in growing season; minimal in winter, but the real interval moves with the season, the light and the pot — so treat the figures below as a starting point and always confirm with the plant itself.
- Spring & summer (active growth): Spring and summer: soak fully, then leave it alone until the soil is dry all the way down — usually around every 2–3 weeks.
- Autumn (slowing down): Autumn: ease off as growth slows; stretch the gap noticeably longer than the summer rhythm.
- Winter (rest / dormancy): Winter: water sparingly, roughly once a month or even less in a cool room. The thick leaves carry it through.
Water sparingly; allow the soil to dry between waterings. Excess moisture, especially around the rosette base, causes crown rot. Keep almost dry in winter when the plant is dormant. Uses the soak-and-dry method.
Want this turned into a live reminder that adjusts to your home and the weather? The Growli watering calculator takes your pot size, light and season and returns a starting interval for hairy stonecrop in seconds.
How to tell hairy stonecrop needs water
A calendar is the worst way to water hairy stonecrop. Check the plant and the soil instead — for this species, look for these signals in order:
- The lower or oldest leaves feel slightly soft or look a touch wrinkled.
- The pot is noticeably light when lifted.
- Soil is dry several centimetres down, not just at the surface.
The most reliable single check is the first one on that list. When two signals agree, water; when they disagree, wait a day and look again — under-watering hairy stonecrop for a day is almost always safer than over-watering it.
Overwatering vs underwatering hairy stonecrop
The two failure modes can look alike at a glance, so check the soil weight and wetness before you decide. For hairy stonecrop specifically:
Signs you are overwatering
- Leaves turn translucent, yellow, soft and mushy — classic overwatering.
- Lower stem darkens or goes squishy at soil level.
- Whole rosettes or sections drop at the lightest touch.
Signs you are underwatering
- Leaves pucker, wrinkle or curl inward — a harmless thirst signal that reverses fast after a soak.
- Older leaves dry crisp from the tips first.
Overwatering is the number-one killer of hairy stonecrop. The thick leaves are a water tank — a slightly thirsty plant recovers in a day; a waterlogged one rots from the roots up.
Water quality notes
Tap water is generally fine for hairy stonecrop; the soak-and-dry rhythm matters far more than water type.
Seasonal and environmental adjusters
Every figure above shifts with the conditions in your home. For hairy stonecrop, the levers that matter most are:
- A gritty, free-draining mix is essential — ordinary potting soil holds too much water for this plant.
- Terracotta dries faster and is more forgiving than plastic or glazed ceramic.
- More light and warmth speed drying, so the interval shortens in peak summer — always check, never assume.
Pot choice is part of this too — work out the right size with the pot size calculator, since a pot that is too big stays wet long enough to rot the roots of hairy stonecrop.
Hairy Stonecrop watering — frequently asked questions
How often should I water hairy stonecrop?
Water hairy stonecrop every 2–3 weeks in growing season; minimal in winter. Spring and summer: soak fully, then leave it alone until the soil is dry all the way down — usually around every 2–3 weeks. Winter: water sparingly, roughly once a month or even less in a cool room. The thick leaves carry it through.
How do I know when hairy stonecrop needs water?
The lower or oldest leaves feel slightly soft or look a touch wrinkled. The pot is noticeably light when lifted. Soil is dry several centimetres down, not just at the surface. The single most reliable test for hairy stonecrop is the first signal on that list — checking the soil or the plant directly always beats watering by the calendar.
What does an overwatered hairy stonecrop look like?
Leaves turn translucent, yellow, soft and mushy — classic overwatering. Lower stem darkens or goes squishy at soil level. Whole rosettes or sections drop at the lightest touch. Overwatering is the number-one killer of hairy stonecrop. The thick leaves are a water tank — a slightly thirsty plant recovers in a day; a waterlogged one rots from the roots up.
What are the signs of an underwatered hairy stonecrop?
Leaves pucker, wrinkle or curl inward — a harmless thirst signal that reverses fast after a soak. Older leaves dry crisp from the tips first.
Can I use tap water on hairy stonecrop?
Tap water is generally fine for hairy stonecrop; the soak-and-dry rhythm matters far more than water type.
Keep reading
- Watering hairy stonecrop in the UK — hard vs soft tap water
- Hairy Stonecrop care — the full brief (light, soil, humidity, problems, pet safety)
- Watering calculator — get a starting interval for your exact pot and light
- Pot size calculator — the right pot keeps watering forgiving
- How often to water succulents — the soak-and-dry method
- Overwatered plant — signs and how to recover it
- Why is my succulent dying? The overwatering autopsy
- How often to water acorus gramineus 'variegatus'
- How often to water aponogeton crispus
- How often to water marsilea quadrifolia
- All 6887 watering schedules in the Growli library