Rhododendron yak. Ken Janek (Ken Janeck Rhododendron)Thick cover of fawn indumentum on the lower leaf surface Low, spreading habit Wide, pale pink florets edged in pink Flowers bloom mid May One of the most admired of the Yaks with a thick cover of fawn indumentum on the lower leaf surface. Habit is low and spreading. Wide, pale pink florets edged in pink in mid May. Hardiness Zone 5 8 Height 2 3 ft Spread 3 4 ft