We have grown lemon trees from seeds taken from lemons purchased at a grocery store. The trees are now about 1 to 2 metres tall, about 3 years old. To date, they have neither flowered nor, of course, fruited. To our annoyance, we can see smaller lemon trees in garden shops which have fruit: ours don't. They are kept inside in a sunny conservatory during the cold seasons; we put them outdoors on warm days and during the summer. We give them Baby-Bio for citrus plants. Still nothing. Can you tell us what we need to do to get fruit? Many thanks for your help Glenn SAMPSON
Certified GKH Gardening Expert
Your trees are probably simply too young to flower; see this article for more information:
The lemon trees you see with fruit in garden stores are probably Meyer Lemons, which are dwarf trees that often flower earlier than other lemons.
You are doing the right things in terms of bringing the tree indoors and outdoors depending on the weather. With time, your tree will get there. These articles will help you identify ways to promote flowering and fruiting: