Window Box Water Reservoirs

Reservoirs are a perfect solution to make your new or existing container gardens easier to maintain. Add these in one size or we can link them for you to create your own self-watering planter. This flexible, effective and proven approach to irrigation is a sensible, easy-to-maintain option when the tank can become problematic due to dirt and mud migration. Easy to place, space, remove, drain, store and clean (inside and out), these reservoirs offer any new or old planter a fresh start without the need to search for or purchase a more expensive watering alternative.

With our wide selection of sizes and custom configurations, you can simply add the reservoir insert to almost any box or planter. Each unit can be used by itself or linked to other PlanterWell reservoirs to create a self-watering system.

Not only do self-watering inserts reduce the amount of time needed to water plants, they also improve plant growth and reduce water waste. Each reservoir will irrigate 9" of soil beyond its edge, so one 24" reservoir will keep the soil moist in a window box or planter that is 42" long.

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Self-Watering Reservoir Instructions:

Step 1: Place a thin layer of gravel at the bottom of the planter. This will provide emergency drainage in case of overwatering.

Step 2: Place 1"-2" of soil over the gravel, and then place the self-watering reservoir on the soil base. For very large planters, connect multiple reservoirs with linking units.

Step 3: Insert the fill tube into the reservoir and trim so it is 1/2"-1" above the top of the planter.

Step 4: Fill the planter with soil to the desired level. Tamp it down but do not pack it firmly. See below for soil tips.

Step 5: Add plants as usual. You can hide the fill tube if desired, but make sure you can easily pour water into it.

Step 6: Water the soil thoroughly and add water to the fill tube until the reservoir is full.

Step 7: As time passes, add water to the fill tube as necessary. Usually, it will take the plants 1-2 weeks to use all the water in the reservoir.

Step 8: Enjoy your plants as they grow healthy and strong without worry of over- or under-watering!

Hooks & Lattice recommends a lightweight, fibrous soil for use with self-watering inserts. This will assist the "capillary action" that draws water to the roots and help the distribution of moisture throughout the root zone. Avoid soil with too much sand or clay. Soil-less potting mixtures with perlite, peat moss and coco coir work well.

Frequently Asked Questions About Plant Reservoirs | FAQ

Question: How do I use my planter reservoir?

Answer: As suggested in Step 7 above, you will need to monitor your self-watering reservoirs once you've initially installed them. Typically, you will not need to add water for approximately two weeks. However, this can fluctuate due to time of year, weather and temperature, and plant variety.

Question: How do self-watering planters work?

Answer: Reservoir inserts have a straightforward design. They include a plastic hollow platform that sits in the underside of the planters or hanging baskets. This hollow space creates the water reservoir. The topside of this platform comes with drainage holes that allow water to filter through watered soil and collect beneath the platform in the reservoir space for later use. The fill tube is attached to, and is part of, this mechanism. Instead of watering over the top of the soil, the fill tube allows you to supply water directly to plant roots, where they draw it up through the soil through capillary action, or wicking. This further hydrates the grow medium or soil for the plant roots to drink from.

Question: How much water do planters with water reservoirs hold?

Answer: Since water reservoirs are designed and sized to fit the container they will be used in, the amount of water each reservoir holds varies. In general, capacities range from 1.25 gallons up to 7 gallons of water. If you have a large container that is too big for one reservoir to be effective, we recommend you purchase more than one reservoir to install in your planter. Please check size and capacity for each insert we sell above and purchase according to window box size and reservoir lengths and widths. We also offer custom options. Please contact a representative for more information.