Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to care for mums [title] Divide your plants every three to five years. [step] Dividing plants prevents overcrowding and promotes the maximum amount of blooms. Diving also cleans and rejuvenates old clumps.

Ending1: Dividing mums should be done in the spring when new growth first appears. [title] Dig your plant up, making certain that you are not harming the roots. Ending2: One of the best and most effective approaches is to divide together your mums. If your mums do not flower every year, dividing them around might still be a viable option. Ending3: Try dividing your mums every five to six years once they turn light brown and have wilted and withered. [substeps] Start at one end of your open window and gently move the mums back along the window frame to avoid spreading bacteria through the gap between the air panes. Ending4: How often to divide your mums is also important, as it serves as a temporary arrangement of blooms so that mums can grow and produce more blooms. [substeps] For instance, mums need to be divided for all phases of the year.

Answer format: ending1/ending2/ending3/ending4