Lemon trees in dwarf varieties are commonly grown indoors as decorations and for fresh fruit. The plants require the same care and pruning as the outdoor varieties to maintain the size and fruiting capabilities. Trees grown indoors can be pruned at any time of the year due to the consistent growing temperatures and conditions. Do not be afraid to remove branches while pruning as this increases tree vigor and fruit production.
Sharpen pruning tools prior to making cuts. This will create a clean cut that heals quickly and properly.
Disinfect all pruning tools with a solution mix of nine parts water and one part bleach. Allow the tools to dry completely prior to making cuts.
Prune indoor lemon trees by removing new growth tips to create a rounded look. Prune new branch growth along the trunk if they grow erratically.
Remove branches that cross through the center of the tree and block the trunk. This will allow sunlight to reach the interior of the tree.
Prune suckers growing near the graft union by removing any shoot growth that appears below the graft scar. The graft scar is located 4 to 8 inches above the soil line. Shoots growing from the lower portion are not the cultivar as the upper portion of the tree. This means the rootstock is not the same plant variety as upper trunk and branches.
Remove thorns growing from the new wood growth. Remove the entire branch if it is non-fruiting. The thorns grow as natural protection against animals.