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Plastic pots nest in steel rings on four tiers. Plants quickly fill out to form a blooming "tree" irrigated for 5 minutes a day by drip tubing that runs up the trunk. Diagram
Each spring, the Fredrikses plant pink impatiens in 12-inch plastic pots filled with potting soil. (At planting time, they mix 1/2 teaspoon controlled-release fertilizer into the soil.) Then they set the pots into the rings. A drip-irrigation system waters each pot 5 minutes a day throughout the blooming season. In addition, each pot is fed a dilute liquid fertilizer twice a month.
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