The Tree I.V. system gets new trees to self-reliance in just a few seasons. Smaller quantities of water, strategically placed, is the quickest way to independence. Roots migrate to moisture, so we want the moisture to be encouraging outward growth. Bag watering around the trunk promotes only localized root development resulting in less wind strength and drought tolerance. This package includes 6 Root Seekers and 6 Reservoirs ready to be installed and filled. Please be aware that Tree I.V. drains at a natural rate which is usually within 10 minutes. This drain rate is by design, and is the very best way to water trees. Some customers are disappointed that the buckets don't stay full for a week (See our negative reviews). Fact: Drip irrigation is worse than no irrigation at all because the roots concentrate at the drip source. Nature waters in soak-dry cycles. When you water weekly with Tree I.V. you are imitating nature by scheduling a soaking rain each week.