I have bought a Kalanchoe and it was healthy when I bought it. I have four more plants with the same problem (all purchased from a place like ikea in Ecuador). I wonder if it is a fungus, and how to fight it.
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1Is the soil in the pot very wet? How often do you water and is there a tray underneath the pot? – Bamboo May 14 '16 at 11:22
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Sure, fungus/virus/bacteria, brought on by too much water and/or not enough light.
Diagnostic signs:
- usually on the older growth
- sunken spots on the leaf that start brown and go black
- sometimes in thinner leaves you will see a light dark spot in the centre surrounded by lighter tissue with a thin line between the two. This is the growth/pause cycle in action
Most plants can outgrow these problems if their needs are met. Try this:
- cut back to within one inch from the stem
- move to higher light
- reduce watering
- increase ventilation or open a window
Kalanchoes are pretty tough. Don't worry that you will kill it by pruning.
kevinskio
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I have my plants outside in my garden. It will be the same care for my tagete? – Alejandra Lage May 14 '16 at 19:48
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@Alejandra Lage physical separation prevents rain splashing spores onto the soil of other plants, so, don't put sick and healthy together – kevinskio May 14 '16 at 20:05