Especially valuable for new plantings, and for soaking before digging, or when water is precious during summer droughts. Zip heavy-duty bag around tree, fill with water, and let Treegator drip water to your tree for up to nine hours. Saves time and water, reduces transplant shock. Treegators can be zipped together (two hold 50 gallons) and used in pairs for larger trees. One Treegator® fits 1-4" caliper(diameter) tree; two zipped together fit 5-8" caliper trees. USA made.