After backfilling and lightly compacting the 50/50 mix of existing soil and compost, give the Chestnut Tree a deep watering. Most of the water you put on the plant at first will run away from the plant until the soil is soaked. A general rule of thumb is to count to 5 for every one gallon of pot size. For example, a one-gallon pot would be watered until you count to 5, and a three-gallon container would be 15, and so on. Check the plant daily for the first week or so and then every other day. Water your plants using the counting method for the first few weeks.