Book 3 — Watering Window-Box Flowers

The Soil is Kept Moist by the Water Feeding through the Sponges from the Under Side

The window box for flowers can be conveniently watered in the following manner: Construct a metal box to receive the box holding the soil and bore enough holes in its bottom to admit water to the soil. The inside box should be supported about 2 in. above the bottom of the metal box. Sponges are placed in the bottom to coincide with the holes in the soil box. A filling tube is made at the end. The water is poured into the metal box and the sponges admit only enough water for the plants at all times.