Watering schedule

How often to water Cobweb Houseleek (Sempervivum arachnoideum) — the schedule

Also called Cobweb Hens and Chicks.

More about cobweb houseleek

Watering at a glance

Base rhythm	When soil is fully dry, every 10-14 days in growth; sparingly in winter
Spring / summer	Spring and summer: water when the top of the soil is dry to roughly a knuckle deep — typically every 10-14 days.
Autumn	Autumn: growth slows, so stretch the interval and let it dry a little more between waterings.
Winter	Winter: water noticeably less — often half as often — because low light and dormancy slow water use right down.
Light	Direct sun (at least 4-6 hours)

About Cobweb Houseleek

Sempervivum arachnoideum · also called Cobweb Hens and Chicks · houseplant

Cobweb Houseleek forms tight rosettes of green-to-red leaves laced with fine white cobweb-like hairs across the tips, a distinctive alpine trait. It clusters into mats of offset 'chicks', tolerates frost and drought, and dies after flowering while leaving offsets behind. Hardy, low-care, and ASPCA non-toxic to cats and dogs.

Ideal humidity: 30-50%

Watch for — Crown rot: Water pooling in the webbed rosette or soggy soil. Water at soil level, ensure gritty drainage, and keep the crown dry.

The watering schedule, season by season

Cobweb Houseleek likes a soak-then-partly-dry rhythm — let the top of the soil dry before watering again, and never leave it standing in water. The base rhythm for cobweb houseleek is when soil is fully dry, every 10-14 days in growth; sparingly 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: water when the top of the soil is dry to roughly a knuckle deep — typically every 10-14 days.
Autumn (slowing down): Autumn: growth slows, so stretch the interval and let it dry a little more between waterings.
Winter (rest / dormancy): Winter: water noticeably less — often half as often — because low light and dormancy slow water use right down.

Drought-tolerant. Water from below or at the soil to avoid wetting the webbed crown, then let dry completely. Water sitting in the rosette causes rot.

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 cobweb houseleek in seconds.

How to tell cobweb houseleek needs water

A calendar is the worst way to water cobweb houseleek. Check the plant and the soil instead — for this species, look for these signals in order:

The top 2-3 cm of soil is dry to the touch (or a knuckle-deep finger test comes back dry).
Lifting the pot, it feels distinctly light.
Leaves droop slightly or lose a little of their gloss just before they truly need water.

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 cobweb houseleek for a day is almost always safer than over-watering it.

Overwatering vs underwatering cobweb houseleek

The two failure modes can look alike at a glance, so check the soil weight and wetness before you decide. For cobweb houseleek specifically:

Signs you are overwatering

Yellowing lower leaves and a pot that stays wet and heavy for days.
Soft, brown, mushy stems or a sour soil smell — root rot.
Fungus gnats breeding in permanently damp soil.

Signs you are underwatering

Drooping, curling leaves with crispy brown edges that perk up after watering.
The rootball shrinks away from the pot and water runs straight down the sides.
Slow growth and a generally tired, washed-out look.

Watering cobweb houseleek on a fixed weekly calendar regardless of season is the most common mistake — in dim winter light the same routine drowns it. Check the soil, not the date.

Water quality notes

Tap water is generally fine for cobweb houseleek. If your water is very hard and you see brown leaf tips, switch to filtered or rainwater.

Seasonal and environmental adjusters

Every figure above shifts with the conditions in your home. For cobweb houseleek, the levers that matter most are:

More light and warmth speed drying; the brighter the spot, the shorter the real interval.
Pot size and material matter — small terracotta pots dry far faster than large glazed or plastic ones.
Lifting the pot to feel its weight is more reliable than any calendar for judging when to water.

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 cobweb houseleek.

Cobweb Houseleek watering — frequently asked questions

How often should I water cobweb houseleek?

Water cobweb houseleek when soil is fully dry, every 10-14 days in growth; sparingly in winter. Spring and summer: water when the top of the soil is dry to roughly a knuckle deep — typically every 10-14 days. Winter: water noticeably less — often half as often — because low light and dormancy slow water use right down.

How do I know when cobweb houseleek needs water?

The top 2-3 cm of soil is dry to the touch (or a knuckle-deep finger test comes back dry). Lifting the pot, it feels distinctly light. Leaves droop slightly or lose a little of their gloss just before they truly need water. The single most reliable test for cobweb houseleek is the first signal on that list — checking the soil or the plant directly always beats watering by the calendar.

What does an overwatered cobweb houseleek look like?

Yellowing lower leaves and a pot that stays wet and heavy for days. Soft, brown, mushy stems or a sour soil smell — root rot. Fungus gnats breeding in permanently damp soil. Watering cobweb houseleek on a fixed weekly calendar regardless of season is the most common mistake — in dim winter light the same routine drowns it. Check the soil, not the date.

What are the signs of an underwatered cobweb houseleek?

Drooping, curling leaves with crispy brown edges that perk up after watering. The rootball shrinks away from the pot and water runs straight down the sides. Slow growth and a generally tired, washed-out look.

Can I use tap water on cobweb houseleek?