Level: Beginner
Soft, translucent succulent leaves in damp mix usually point to overwatering or standing water. Wrinkled leaves may mean thirst, but rotten roots can wrinkle a plant too, so check the mix and roots first [1][3]. Stretching is mostly low light [1].
Key points
- Soft, see-through leaves with wet mix suggest overwatering. Wrinkling with dry mix suggests thirst [1][3].
- The two can look alike. Iowa State says rotted roots cause shrivelling that is often mistaken for underwatering [1].
- Stretching is usually low light. Increase light gradually, because a sudden jump to bright sun can scorch leaves [1].
- Hong Kong air is humid, so mix dries slowly. Water by the mix, not the calendar. Jade plant is listed by the ASPCA as toxic to pets [5].
Are my succulent’s soft, translucent leaves overwatering?
Most likely, but confirm with the mix and the roots. Iowa State University Extension says plants in wet conditions get yellowing leaves, soft and mushy leaves and stems, then leaf drop. The surface stays damp and severe cases may show mould or fungus gnats [1]. Illinois Extension says overwatering is by far the easiest way to kill a succulent [4].
Iowa State explains the mechanism. Waterlogged mix holds less oxygen, so roots die. With fewer roots, the plant shows water stress such as dropping leaves or shrivelling [1]. That is why a plant in wet mix can still look thirsty.
Hong Kong note: Observatory normals for 1991-2020 put mean relative humidity at 81 to 83 percent from April to August and about 70 percent in December [6]. The RHS says succulents usually prefer warm, sunny conditions with low humidity [2]. So slow drying in a humid spring or summer is our inference, but it is easy to check with a finger or a wooden skewer. Do not copy an overseas weekly schedule.
How do I tell overwatering, thirst and low light apart?
Check three things: how wet the mix is, how the leaves feel, and where the damage sits. Iowa State suggests pushing a chopstick into the mix. If it comes out with darker, damp marks, the plant does not need water yet [1]. Illinois Extension suggests testing with a finger first [4].
On a phone, swipe sideways to see every column.
| Clue | Possible cause | Next step |
|---|---|---|
| Soft, translucent leaves, damp mix, lower leaves dropping | Overwatering or standing water [1] | Stop watering, check the drainage hole, empty the saucer [1] |
| Wrinkled, thin leaves, bone-dry mix, firm stem | Thirst. Succulents do not wilt like other plants but look desiccated [3] | Soak and let the excess drain [4], then watch for a few days |
| Wrinkled leaves but wet mix | Possible root rot. Iowa State says this is often mistaken for underwatering [1] | Unpot and check roots. See root rot |
| Long stem, wide gaps, pale colour, flat rosette | Low light [1] | Raise light gradually or add a grow light (see below) [1] |
| Brown or tan patches on the side facing light | Sun scald after a sudden change [1] | Acclimatise slowly. Dead tissue will not recover [1] |
| Bottom leaf or two dry and papery, the rest plump | Iowa State says occasional dry lower leaves on rosettes are normal [1] | Pick them off and keep watching |
| Cottony white masses, sticky leaves | Mealybugs. Iowa State describes cottony masses and honeydew [1] | Isolate. See mealybugs |
Why is my succulent stretching?
Usually low light. Iowa State describes tall, spindly, pale new growth as a sign of too little light, and rosette types open and flatten their leaves to catch more [1]. Illinois Extension suggests a south or west window indoors [4], and the RHS suggests a sunny windowsill [2].
For supplemental light, Iowa State suggests ten or more hours of light a day indoors. If a window is not bright enough, it suggests full-spectrum lights set about 12 inches (30 cm) from the plants for 12 to 16 hours on a timer [1]. This is a US university recommendation for home growers. Lamp output varies, so watch how the plant responds. See light, PPFD and DLI.
Stretched growth may not reverse. Iowa State says some species recover over time and others need pruning back, while many barrel-type cacti keep narrow spindly growth permanently even with more light [1]. See leggy plants and pruning basics.
What should I do step by step?
- Stop watering. Do not add water just because leaves wrinkle. Check the mix with a finger or skewer [1][4].
- Make sure the pot has a drainage hole and that no water sits in the tray or sleeve [1].
- If you suspect rot, unpot and look at roots and stem base. Iowa State says plants sometimes recover when allowed to dry, but advanced rot may be unrecoverable. You can discard the plant or propagate healthy-looking segments [1].
- Change the mix if it stays wet. Iowa State says overly organic or fine mix holds too much water [1]. The RHS suggests free-draining, gritty compost [2], and UC Master Gardeners suggest adding coarse perlite, crushed lava or pumice [3].
- Water on a wet-dry cycle: soak, let the excess drain away, then wait until the mix is fully dry [4]. Iowa State calls this the best way to avoid root rot in succulents [1].
- For stretching, move to a brighter spot in small steps [1].
What should I avoid doing?
- Putting gravel at the bottom of the pot for drainage. UC Master Gardeners say a gravel layer actually makes drainage worse [3].
- Watering on a fixed weekly day. Needs change with light, temperature and pot. Illinois Extension advises testing the mix first [4].
- Adding water because the leaves are wrinkled. If roots are rotten, more water makes it worse [1].
- Moving a plant from a dim room straight into hot sun. Iowa State names a sudden move from low light to strong sun as the main cause of scald [1].
- Treating every succulent as a desert plant. The RHS notes that rainforest types such as Christmas cactus, Epiphyllum and Rhipsalis like more frequent watering and semi-shade [2].
Pets: the ASPCA lists jade plant (Crassula argentea) as toxic to dogs, cats and horses, with vomiting, depression and incoordination [5]. Other succulents vary, so check a reliable list before buying. Call a vet if a pet chews a plant.
How do I prevent problems in a Hong Kong flat?
Start with the local climate. Observatory normals show a January mean of 16.5°C, a July mean of 28.9°C and an annual mean relative humidity of 78 percent [6]. The RHS says succulents generally like good ventilation and low humidity [2]. In Hong Kong, the usual spring and summer risk is therefore damp mix and stuffy air, more than dryness.
- Mix: use free-draining gritty compost [2][3]. Avoid fine or very organic mix [1].
- Air: the RHS says succulents like ventilation, especially in summer [2]. A bright window with moving air helps, but avoid a direct cold blast from air-conditioning (inference).
- Humid spells: when the air is saturated, mix dries more slowly, so stretch the gap and test first. No source covers Hong Kong’s humid spells in particular, so this is inference.
- Winter: the RHS advises little watering during a cool winter rest, just enough to stop plants shrivelling [2]. Its example is a night temperature of 8 to 10°C, but Hong Kong’s mean December minimum is 16.2°C [6]. So do not copy a no-water rule. Test the mix and know the species.
When should I give up or ask for help?
If the stem base is black and soft, or most roots are rotten, Iowa State says recovery may not be possible. You can discard the plant or propagate healthy segments [1]. See propagation guide.
For mealybugs, Iowa State mentions rubbing alcohol on a swab, or insecticidal soap and neem used as directed on the label [1]. Follow the label on any product. In Hong Kong pesticides are regulated under the Pesticides Ordinance (Cap. 133); check the Agriculture, Fisheries and Conservation Department. We do not suggest home-made mixes.
Frequently asked questions
Are my succulent leaves wrinkled from thirst or rot?
Both can wrinkle. Iowa State says rotted roots cannot take up water, so the plant shrivels, and this is often mistaken for underwatering [1]. If the mix is dry and the stem is firm, thirst is likelier. If the mix is wet, unpot and check the roots.
Can a mushy succulent be saved?
It depends how far the rot has gone. Iowa State says plants sometimes recover when allowed to dry out, but advanced rot may be unrecoverable, and healthy segments can be propagated [1]. Mushy tissue will not plump up again.
How often should I water succulents?
No source gives a fixed number of days. Illinois Extension says to check the mix with a finger and wait until it is completely dry, then soak and let excess water drain [4]. UC Master Gardeners also describe infrequent watering as the plants approach dryness [3].
Can I use a grow light for stretched succulents?
Yes. Iowa State suggests full-spectrum lights about 12 inches away on a 12 to 16 hour timer [1]. Lamp strength varies, so adjust to how the plant responds.
Sources
- Iowa State University Extension: “Common Problems and Issues of Succulents” — Signs and fixes for overwatering, underwatering, root rot, low light, sun damage and dead lower leaves
- Royal Horticultural Society (RHS): “How to grow cacti and succulents / RHS Growing Guide” — Free-draining gritty compost, light, ventilation, low humidity preference, rainforest succulent exceptions
- UC Master Gardeners of Santa Clara County: “Succulents” — Succulent mix, no gravel layer in pots, infrequent watering, desiccated look when dry
- University of Illinois Extension: “Growing Succulents: Beyond the Basics” — Check the soil before watering, soak then drain, south or west window
- ASPCA: “Toxic and Non-toxic Plants: Jade Plant” — Jade plant (Crassula argentea) is toxic to dogs, cats and horses
- Hong Kong Observatory: “Monthly Meteorological Normals for Hong Kong (1991-2020)” — Hong Kong monthly mean temperature and relative humidity
Further reading
- Back to Plant Doctor
- Overwatered or underwatered? A side-by-side check
- Root rot: how to tell and when to give up
- Leggy plants: why they stretch and how to fix them
- Potting mix science
- The humid season and your plants
Sources checked: 31 October 2026. This is general guidance, not an on-site diagnosis. Always follow the product label.
