I've been trying to grow some lemon trees from seeds. Everything went mostly fine: out of a dozen germinated seeds I got 5 seemingly strong & healthy saplings growing. These are the saplings after about half a year:
However, after a few more months they started to gradually lose all their leaves. This is how they look now:
Presumably, some of them are almost dead by now. I initially thought that temperature might be the problem, but I'm not so sure about it now: weeks of warm (+20°C - +25°C) weather didn't stop the leaves from falling off. So, my main ideas for what caused this are:
- Hard water. I used water from a regular tap, which might have too much minerals in it. You may see some sediments on the soil. The most sediment appears to be on the soil with the most up-to-day healthy plant, - presumably it got less minerals dissolved inside the soil.
- Bad soil. I used some general soil from local gardening market, nothing special.
- Bad lighting conditions. I have one table lamp (something like the one on the picture below) lighting the lemons directly from above, roughly 16 hours a day.
So, my questions are:
- What is the most probable cause of the saplings losing their leaves? How to prevent this in future?
- Is there any chance I could save the two saplings that still have some leaves on them and haven't dried out yet?