Cut manual watering runs on young trees and shrubs to roughly once a month with this 4-pack 10 gal. self-watering tree ring, a ring-style irrigation system that absorbs rain and snow to refill itself and can go up to 30 days between manual top-ups depending on local humidity, temperature, and precipitation. Each ring holds 10 gal. (37.8 L) of water and spreads its Ø23 in. (Ø590 mm) coverage evenly around the root zone, so the slow-release system nourishes roots from all sides rather than drenching one half and missing the other. The 4-pack fits newly planted saplings and mature trees alike, handling trunks up to 3.54 in. (90 mm) in diameter with a minimum tree height of just 1.97 in. (50 mm). Durable PVC construction with a built-in water-retaining agent keeps the ring pliable and resilient through summer sun, winter freezes, and branch-scratch exposure, and the 1.81 lb. (0.82 kg) lightweight design makes seasonal repositioning easy. Setup is simple: soak the ring in water until fully absorbed, then wrap around the tree trunk; for better results, cover with coarse mulch like wood chips, and during dry seasons check the ring and surrounding soil regularly, topping up water as needed. Model TWB-10gal-ZW4. Ideal for homeowners maintaining new shade trees, orchard owners conserving water, weekend-only rural property owners, and landscape crews supporting trees after planting through the first critical season.