What Is The Problem With Cistus X Purpureus Plants?

Question

In 7/21 four cistus x purpureus shrubs were planted in the same yard, soil and watering schedule etc. Two are doing well and starting to bloom in 4/23. See Fig. 1. The other two are having problems. See Fig. 2.

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Answer 1

It could be that this part of the yard remains more moist. These plants need zero watering after the first season. Being a xeriscape plant. it prefers poor, dry soils. They are prone to disease if they are planted in moist areas.

I would be sure to hold off on feeding, and do not water, at all. You may want to use a fungicide on them, as well.

Here are some articles that will help:

https://www.gardeningknowhow.com/ornamental/shrubs/rockrose/how-to-grow-rockrose-shrubs.htm

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm