Over the past year we've tried to grow several small houseplants in our apartment, but every one of them has succumbed to an infection of some sort. For what it's worth, we keep our house spotless, so it's not like there's (visible) mold growing anywhere that could be a vector. Here are some examples of our casualties:
- Spruce bonsai: spruce mites
- Aloe: white mold (unsure what kind)
- Amaryllis: bulb rot (red, not sure exactly what kind), and Southern Blight
- Heart-leaf philodendron: Southern Blight
All plants were watered exactly as instructed, most kept in draining pots. They were also either in a location with plenty of sunlight, or were supplemented with a grow-lamp like this one. I really want some kind of plants in here, but I don't want to spend the time and effort if they're just going to get infected again. So my question is two-fold:
- Is there possibly a single reason why all these infections are happening (and what can I do about it, if anything)?
- Are there any houseplants that would be resistant to these types of infections which would be safer to try? Or growing/care techniques to fight infection?
Edit based on comments:
None of these plants were ever outdoors (aside from transporting them from their origin store or house). Aloe and spruce were watered 1-2 times per week based on soil dryness. Philodendron was watered 2-3 times per week based on soil dryness. Plants were watered until it began to flush out of the drain. Amaryllis was kept in a large glass vase with pebbles and water filled to cover the bulb, water was changed once per week and the pebbles were washed, damaged parts of the bulb removed when the red rot started showing, Southern Blight-like mold/symptoms started showing above the water line towards the end. All others were kept in their original potting soil. I didn't have any of the infections lab-tested, but the mites were easy to identify and the Southern Blight I'm 90% sure about based on appearance/symptoms and that it's endemic to my area.