SOIL Tolerates a wide range of soil types as long as good drainage is present. The addition of generous amounts of organic matter to the soil is extremely beneficial to growing high quality specimens. These can be planted anytime from late spring until about a month before a hard, killing frost. This plant is usually propagated by seed from choice, dark-leaved forms.
Flowers are self sterile.
Palace Purple' can also be vegetatively propagated by leaf node cutting and division.