When we say moist, we are referring to rainfall only. This is without any water!!! They cannot tolerate the 500 inches of rainfall most people like to put on their earwig and slug infested perennial gardens. The only Penstemon that can tolerate garden water is maybe Margarita BOP or Penstemon heterodoxus. The rest will just rot off. So, only water them a little to get them established. If you live in dryer parts of California ( Bakersfield, San Diego, Death valley, etc.) and want to plant these, then you can augment your rainfall a little. A Little!!!! Details on how to water California native plants. These are not Petunias so don't insult them my treating them like ones.
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