Aptitude and tolerance to light environment of “Heuchera” as plant for urban greening

Abstract

Heuchera (‘‘Lime Rickey’’, ‘‘Peach Flambe’’, ‘‘Caramel’’) was taken up as plant for urban greening in this research. The relation of the growth between light conditions was investigated. The growth experiment was conducted under a different illuminance condition. As a result, Peach Flambe excels in strong light, and excellent growth was shown in the high illuminance condition. It was possible to endure up to about 15% in a relative low illuminance. Lime Rickey and Caramel caused the leaf scorch phenomenon in 100%, and the growth damage appeared. Best illuminance condition of Lime Rickey was about 35 % and that of Caramel was about 35–50%. Then Lime Rickey was able to endure up to about 15% and it was 5% as for Caramel. However, original beautiful color is ruined under the low illuminance condition.