Plant in a location that enjoys partial sun and remember to apply water fairly sparingly. Keep in mind when planting that Van Leenenii is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside. Van Leenenii requires a soil ph of 6.1 - 7.8 meaning it does best in weakly acidic soil - weakly alkaline soil.
Growing Van Leenenii from seed
By our calculations, you should look at sowing Van Leenenii about 105 days before your last frost date.
Transplanting Van Leenenii
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Van Leenenii is a tender plant.