To find out the best IBA concentration and cutting time for rooting of Rhododendron subsect. Maddenia( Hutch.)Sleumer cuttings,we studied the effects of four IBA concentrations and four cutting time on rooting of cuttings of Rhododendron kiangsiense and Rh. liliiflorum,using soil + sand( 1 ∶ 1) and peat + perlite + vermiculite( 3 ∶ 1 ∶ 1) as rooting media. The results showed that IBA concentration had significant effects on most parameters except for retention number of old leaves. Cuttings treated with 100...