Water deeply about once/month.
Monlo likes a position of full sun and remember to apply water fairly sparingly. Monlo is generally regarded as a very hardy plant, so this plant will tend to go dormant over the long winter months. Monlo needs a soil ph of 6.0 to 8.0 (weakly acidic soil - weakly alkaline soil).Plant in full sun for best color but will tolerate a variety of conditions. To control size and preserve the fountain shape of big old shrubs, can prune about 1/3 of branches to the ground each year after bloom. If a full bodied look is desired, prune back individual branches of younger shrubs back by 1/3 just after flowering.
Monlo is very hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.Purple ninebark, Diabolo, Diablo