which is now producing a number of flowers, Do these flowers require fertilisation ?
I Have Recently Acquired a Small Indoor Lemon Tree Which Is Now Flowering
Certified GKH Gardening Expert
If you would like fruit, then yes they will need to be pollinated. If the lemon tree is small, you may want to hold off until the lemon tree is larger. But if it is large enough that you feel it can support fruit, you can pollinate the flowers by using a small paintbrush to swirl inside the flowers and this will pollinate them.