Hello there, I hope you can help. Bought a lemon tree end of summer last year, has been constantly dropping leaves since, was in a south facing bedroom window (radiator turned off), using winter citrus feed 18-18-18 at every feed. In the last month I have been taking it outside for the day and in for nights as its 3-6 degrees at night here. The last few nights its stayed outside when above 5 degrees. Recently changed to summer fertiliser 25-10-18 I think. Recently repotted using Citrus Compost only, but quite worried as it looks to hold in moisture easily. Some of the leaves are also turning yellow, especially the new growth. Also the tips of the branches were turning brown, so I chopped them back slightly. The tree used to be on one of those circular things, but Im trying to open it out more, hence the ugly appearance. Is there anything I am doing wrong? Can I put it in my greenhouse constantly, will it be ok over night?