It’s important not to let the log dry out but it’s also important not to over-water the log. Balance is key. Logs should be stored in shady outdoor locations close to the ground. In temperate climates, they generally retain enough moisture to colonize fully without watering. During especially dry years, droughts, and in arid climates, watering may be necessary. Most of the time though, no supplemental watering is needed.
It’s okay to water the log to force it to fruit but most growers wait until the log fruits once naturally before beginning to shock them into fruiting. Logs shouldn’t stay wet on the outside for long periods of time. Frequent light watering can even damage logs and cause contaminant growth. Long periodic soaking is the preferred method of renewing water content should your logs appear dry or lose vitality.