Hi guys I'm new I'm from the UK and I had a go at planting lemon seeds I didn't expect them to grow but they did, I can't remember when I planted them but they are more then 6 months old, they haven't really grown very much and lost a lot of the lower leafs and grow new ones at the top some of the leaves have some yellowing around the edges. I was just wondering what if anything I'm doing wrong or not doing? They have been grown indoors close to a window but didn't put them right in the window as I thought the sun might burn them. Thanks