Cornish mallow needs water regularly throughout the growing season. Beginning in spring, you should plan to water this plant about once per week. As the season presses on and grows warmer, you may need to increase your watering rate to about two to three times per week. Exceeding at this rate can be detrimental to your
Cornish mallow. With that said, you should also ensure that the soil in which your
Cornish mallow grows remains relatively moist but not wet, regardless of how often you must water to make that the case. Watering
Cornish mallow that lives in a pot is a bit different. Generally, you'll need to increase your watering frequency, as the soil in a pot can heat up and dry out a bit faster than ground soil. As such, you should plan to water a container-grown
Cornish mallow a few times per week in most cases, versus just once per week for an in-ground plant.