Why are the leaves of my Swiss cheese plant browning and ...
10ft to light, indirect
6” pot with drainage
Last watered 2 days ago
1
If you don’t have any pests (try shining a flashlight through the leaves and see if you see the shadow of any bugs or eggs), the first thing that comes to mind is a watering issue. If you are misting your plant you should stop, it can be a cause of the pitting on your leaves. Another possibility is some amount of sunburn there, but the damage seems too inconsistent to be from sunburn.
My adansonii is variegated so it tends to brown easily if any water sits on the leaves for a bit. I find that this plant is prone to guttation more than anything else I have, meaning when it has too much water or minerals it will try to expel the excess through its leaves at night, so unless I’m careful to only water it just enough to get the soil moist (but no excess) I typically have to spend the next day or two dabbing up guttation on the leaves to avoid browning. You will generally notice guttation at night, because the plant’s stomata (pores in its leaves used for things like gas/water exchange) close at night and if there is excess water it will build up pressure and just leak out through leaves. Guttation will typically come out near the edges and tips of the leaves (especially on adansonii), so that is why I think it could be overwatering. If you are fertilizing too frequently or using tap water with a lot of minerals in it, your plant could also be trying to get rid of excess minerals and salts via guttation and it is causing that kind of damage when it dries.
Check your plant for pests, make sure you are letting the soil dry out between watering, water just enough to moisten the soil, use filtered water, and if you are fertilizing more frequently than every few months consider cutting back.
My adansonii is variegated so it tends to brown easily if any water sits on the leaves for a bit. I find that this plant is prone to guttation more than anything else I have, meaning when it has too much water or minerals it will try to expel the excess through its leaves at night, so unless I’m careful to only water it just enough to get the soil moist (but no excess) I typically have to spend the next day or two dabbing up guttation on the leaves to avoid browning. You will generally notice guttation at night, because the plant’s stomata (pores in its leaves used for things like gas/water exchange) close at night and if there is excess water it will build up pressure and just leak out through leaves. Guttation will typically come out near the edges and tips of the leaves (especially on adansonii), so that is why I think it could be overwatering. If you are fertilizing too frequently or using tap water with a lot of minerals in it, your plant could also be trying to get rid of excess minerals and salts via guttation and it is causing that kind of damage when it dries.
Check your plant for pests, make sure you are letting the soil dry out between watering, water just enough to moisten the soil, use filtered water, and if you are fertilizing more frequently than every few months consider cutting back.