I have had a Cinhese Elm for the past month. I got it on the first of may for my birthday and it was in good condition when it arrived. A few of the leaves were yellowing but was told that this wasn't something to worry about. After reading lots of info on caring for the little fella i placed him outside in my garden on the garden table. It gets a lot of light through the day and i have been watering regularly as soon as the soil goes dry to the touch. I water with plant food and tap water by soaking the soil till there is water flowing from the underneath. I then wait for 10 minutes and repeat the process. I water directly onto the soil. It has rained a few times though and now looking at the leaves some have started to develop black spots that look like slightly raised burn marks. The coverage is about 1 in 15 - 20 leaves at the moment (i don't have pictures at the moment but will try and get some) Having done some research i think that it might be black leaf spot. Help!
Also some tiny spiders made their home in the leaves and I removed them but was wondering if they might be detremental to the bonsai or not?