Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean a planter [title] Understand why it's important to clean your planter. [step] Disease can be transmitted between plants if you don't clean out a planter, even if you replace the soil in it. Disease spores hide in plant matter and can remain in soil for many years.

Ending1: That's why it's important to clear all disease-carrying material out of planters between uses. [substeps] Porous planters, such as wood and terracotta, will harbor disease especially well. Ending2: Instead of killing the plants you own, clean out the planter by replacing their soil. [substeps] If you don't remove dirt, bugs and disease will soon rise up and become more harmful. Ending3: Most planter owners will not clean or sterilize the planter; it's only for now. [substeps] You can restore or replace the soil in a planter with flue moss or porous mulch to keep the soil close to the surface. Ending4: Being able to clean your planter often prevents bacteria from growing in. [substeps] Be sure to use a tool such as a sponge to gently scrub a small area while cleaning a planter.

Answer format: ending1/ending2/ending3/ending4