overwatering and Fenestraria
Quick answer
If overwatering is what's going on with your Fenestraria, the most likely cause is: Fenestraria is a winter-growing Aizoaceae adapted to near-desert sand; when it is watered too generously — especially while dormant in summer or in dense, undivided clumps — the inner stems stay damp, surplus humidity causes the plants to lose their compact form, and the buried stems rot from the inside out because they cannot tolerate summer moisture at all.
Start here:
- 1. Water sparingly only from spring to autumn and withhold water entirely in winter when the plant is dormant; wait until the leaves become slightly less turgid before giving another drink, and always let the compost dry out completely between waterings so the growth stays flush with the soil.
- 2. Repot overcrowded clumps by division during the growing season, spacing the heads so air can move between them, and switch to a very free-draining mix such as two parts sharp sand, one part soil-based potting compost, one part potting grit and one part sifted composted bark.
Why overwatering happens to Fenestraria
Fenestraria
Fenestraria is a winter-growing Aizoaceae adapted to near-desert sand; when it is watered too generously — especially while dormant in summer or in dense, undivided clumps — the inner stems stay damp, surplus humidity causes the plants to lose their compact form, and the buried stems rot from the inside out because they cannot tolerate summer moisture at all.
How to correct overwatering on Fenestraria
- 1
Water sparingly only from spring to autumn and withhold water entirely in winter when the plant is dormant; wait until the leaves become slightly less turgid before giving another drink, and always let the compost dry out completely between waterings so the growth stays flush with the soil.
- 2
Repot overcrowded clumps by division during the growing season, spacing the heads so air can move between them, and switch to a very free-draining mix such as two parts sharp sand, one part soil-based potting compost, one part potting grit and one part sifted composted bark.
Keep overwatering from repeating on this Fenestraria
Grow Fenestraria in a shallow terracotta pot with a sandy, low-organic mix in bright light with good airflow; place it in a well-ventilated, not-too-bright spot during the hot summer rest; never water when temperatures are high or the compost is still damp; and top-dress with coarse silica sand rather than moisture-holding grit to keep the buried stems dry.