I am in need of help with regards to my lemon tree. I bought a mature lemon tree back in the summer for £10. They were selling them off, as they were trees they had kept for a while and not sold. It was healthy with lush green leaves and a lemon when I bought it. It has been in my living room since and in a temperature of around 22 degrees. I water it every now and then, as I don't want to over water, but I am now worried I have not watered enough. All the leaves have dropped off and it is looking very stick like and brown, although there are signs of green underneath, so I am hoping it is still alive. I fed with the summer mix and have now (since September) gone onto the winter feed. It was looking really dry so I have put in a bowl with winter feed and left to soak up, not sure this is the right thing to do, but it just looks so dry. Is it worth cutting it back? Will it enhance fresh growth? There is one lemon bud which is dark in colour and the size of a sunflower seed. Any advice would be very gratefully received, as I don't want to lose it. The tree was treated with organic spray back in the summer when it had blackfly. Kind regards Kirsty.
Water your citrus in the same manner as most house plants, when the top inch or so of soil dries, water throughly again.
Make sure the pot is draining well.
Make sure you check the soil and don't water on a schedule.
Your tree was likely stressed before your purchase and is adjusting to the new light situation.
You should aim for a good amount of sunlight 5 to 6 hours a day.
Humidity is very important for an indoor citrus tree.
Here are some links to help you.