Alkali Marsh Mallow*
Sidalcea diploscypha
Care
moderate
1–2ft tall
Friendly
Prized
Central Valley and surrounding foothills from Kern County to Tehama County, below 1000 ft elevation, in vernal pools and alkali flats
Care Guide
Planting
Plant your Alkali Marsh Mallow in fall or winter, which aligns with California's natural growing season for this annual herb. This species thrives in the grasslands and woodlands of central California, so choose a spot with good drainage - it naturally grows in valley grasslands and foothill woodlands rather than wet areas. Space plants about 1 to 2 feet apart since they grow 1 to 2 feet tall and will fill in nicely.
After Planting
Water moderately during the growing season, then taper off as the plant matures - this matches its natural habitat where summer moisture is limited. As an annual, expect this plant to bloom, set seed, and complete its life cycle within one year; it won't return the following season. The biggest mistake is overwatering; remember this is a drought-tolerant native that prefers drier conditions once established, so err on the side of less water rather than more.
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Wildlife Supported
Insects
Early spring foraging on Sidalcea flowers during emergence period
Pollen feeding during bloom period
Spring/early summer pollen feeding and potential foliage browsing