seeds Alstromeria exserens a species stays small in cultivation and tolerates temperatures at least down to 20 degrees F. Loves either full or part sun. Llarge flowers with color ranges from reddish-pink to near white. Plants grow around 4 to 6 inches tall when in full bloom. Provide some light shade and a soil that has good drainage (gritty and rocky soils are best), fertilize sparingly. Hardy in zones 8B-11.