Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to prune citrus trees [title] Prune at least once a year. [step] Once a citrus tree is established and producing fruit, it needs to be fully pruned every 12 months. Go ahead and mark your pruning dates on your calendar, so that you don't forget them.

Ending1: You should also prune your trees before the blossoms change. After 10 years, be sure to prune the branches that grow from the tree. Ending2: Doing so will save you time and money. [title] If necessary, trim back the fruit that will eventually be in the trees. Ending3: Alternatively, you can de-stress and remove the dead or diseased branches as soon as you finish the tree. [substeps] Don't remember to prune these branches. Ending4: If your tree suffers from disease or damage, add another pruning session in. [substeps] If you've pruned a tree down to its base before, it may take a few years for it to recover fully enough to benefit from an annual pruning.

Answer format: ending1/ending2/ending3/ending4