Watering schedule

How often to water Rock Jasmine (Androsace sarmentosa) — the schedule

Also called Rock Jasmine, Sarmentose Androsace.

More about rock jasmine

Watering at a glance

Base rhythm	Water moderately in spring and summer; reduce in autumn and winter
Spring / summer	Spring and summer (active growth and bloom): keep evenly moist, watering when the top 2-3 cm is dry — typically when the soil tells you it is time.
Autumn	Autumn: ease back as flowering finishes and growth slows; let it dry a little more between waterings.
Winter	Winter / rest: water sparingly while it rests, then resume as new growth and buds appear.
Light	Direct sun (at least 4-6 hours)

About Rock Jasmine

Androsace sarmentosa · also called Rock Jasmine, Sarmentose Androsace · flowering

Rock Jasmine is a charming, mat-forming alpine perennial from the Himalayas and western China. Silvery-hairy rosettes spread by stolons to form wide colonies, smothered in spring and early summer with heads of deep pink to rose flowers with yellow eyes. An excellent choice for rock gardens, scree beds, and stone troughs; fully frost-hardy.

Ideal humidity: Low to moderate, 30–55% RH

Watch for — Crown rot in winter wet: The hairy rosettes trap moisture in cold, wet winters, leading to fungal rot. Apply a dry gravel mulch under the foliage, ensure sharp drainage, and consider overhead protection with a pane of glass in persistently wet climates.

The watering schedule, season by season

Rock Jasmine flowers best on steady, even moisture — let it dry out hard and it drops buds; keep it soggy and the roots rot before it can bloom. The base rhythm for rock jasmine is water moderately in spring and summer; reduce in autumn and 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 (active growth and bloom): keep evenly moist, watering when the top 2-3 cm is dry — typically when the soil tells you it is time.
Autumn (slowing down): Autumn: ease back as flowering finishes and growth slows; let it dry a little more between waterings.
Winter (rest / dormancy): Winter / rest: water sparingly while it rests, then resume as new growth and buds appear.

More tolerant of some moisture than other Androsace species thanks to its Himalayan origin with monsoon summers, but still requires well-drained conditions. Keep soil evenly moist but never waterlogged during active growth; reduce watering significantly in winter to prevent crown 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 rock jasmine in seconds.

How to tell rock jasmine needs water

A calendar is the worst way to water rock jasmine. 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.
Leaves or flower stems lose turgor and start to droop.
Buds stall or the pot feels light.

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 rock jasmine for a day is almost always safer than over-watering it.

Overwatering vs underwatering rock jasmine

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

Signs you are overwatering

Yellowing leaves, bud drop, and a heavy, constantly wet pot.
Mushy stems or crown rot at soil level.
Fungus gnats and a sour soil smell.

Signs you are underwatering

Wilting, bud and flower drop, and crispy leaf edges.
A faded, stressed look and a rootball that has pulled from the pot sides.

Erratic watering — bone dry then flooded — makes rock jasmine drop its buds and flowers. Consistency through the budding period is what protects the display.

Water quality notes

Tap water is generally fine for rock jasmine unless your water is very hard; rainwater is a safe default if leaf tips brown.

Seasonal and environmental adjusters

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

A blooming plant in good light drinks faster than a resting one — shorten the interval during flowering.
Brighter, warmer spots dry the pot faster; check before watering rather than fixing a date.
Empty the saucer after every water so the roots are never sitting in run-off.

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 rock jasmine.

Rock Jasmine watering — frequently asked questions

How often should I water rock jasmine?

Water rock jasmine water moderately in spring and summer; reduce in autumn and winter. Spring and summer (active growth and bloom): keep evenly moist, watering when the top 2-3 cm is dry — typically when the soil tells you it is time. Winter / rest: water sparingly while it rests, then resume as new growth and buds appear.

How do I know when rock jasmine needs water?

The top 2-3 cm of soil is dry to the touch. Leaves or flower stems lose turgor and start to droop. Buds stall or the pot feels light. The single most reliable test for rock jasmine is the first signal on that list — checking the soil or the plant directly always beats watering by the calendar.

What does an overwatered rock jasmine look like?

Yellowing leaves, bud drop, and a heavy, constantly wet pot. Mushy stems or crown rot at soil level. Fungus gnats and a sour soil smell. Erratic watering — bone dry then flooded — makes rock jasmine drop its buds and flowers. Consistency through the budding period is what protects the display.

What are the signs of an underwatered rock jasmine?

Wilting, bud and flower drop, and crispy leaf edges. A faded, stressed look and a rootball that has pulled from the pot sides.

Can I use tap water on rock jasmine?