I’ve noticed a few yellowing spots on my two monsteras. One I’ve had for over a year and it’s grown 4 new leaves during that time. The other one I got a few weeks ago. I’ve noticed a few brownish/yellow areas on several leaves on both plants. I even had to cut one leaf off my older monstera because it fully yellowed and died. Wondering if you guys can help me diagnose the issue. Is it over or under watering? Too much sunlight?
Pictures 1-2 are from the plant I got a few weeks ago
Pictures 3-7 are from the plant I’ve had over a year
I water about once per week (and check that the soil is dry up to first knuckle of index finger) with about 1-2 cups of tap water. I haven’t been using any fertilizer. Both plants are close to east and south facing floor to ceiling windows. They get direct morning and midday sun and lose the direct sunlight around maybe 3pm.
by Jono_SK
6 Comments
It could be from the kind of tap water you have. You’re supposed to let tap water sit out for 24 hours, as there’s bleach and you need to let the water oxygenate. I use filtered water on my plants, maybe every 2 weeks or so? You might be over watering with tap water, as I let my monstera guzzle up water during its watering session with basically a whole pitcher of water. Instead of 1-2 cups every week.
On pic 5 on the leaf you’re holding, on the part next to the first fenestration from the top you can spot two thrips larva. you sadly have thrips
First thing’s first, these babies need a good wipe down! I wipe mine about every month or 2 as the dust can effect their ability to receive light. That’s also a good way to check for pests!
Whenever I get yellow leaves, I immediately check the roots to see what’s going on. If roots look good (no rot or dried roots) & there’s no pests, it’s likely the hard water.
ETA: someone showed where the thrips are & I see them now!! Def thrips. I provided some example pest management below!
I’d say underwatering + burnt by the sun
I think it’s time for shades and check if they need a bigger pot
This is definitely thrips. If you look at the underside of the damaged leaves you’ll see little white larva. They lay their eggs inside the leaf tissue, so if you have access to systemic insecticides they will work the best. I’ve dealt with thrips using only topical insecticide, but it takes a lot of consistent, repeated applications.
Thrips.