Royal Jacob's-ladder
Polemonium carneum
Care
part shade
moderate
1–3ft tall
Resistant
Friendly
Prized
Sierra Nevada mountains from Fresno to Inyo County, 7000-11000 ft elevation, in subalpine and alpine meadows.
Care Guide
Planting
Plant your Royal Jacob's-ladder in partial shade - it naturally grows in open and moist forests, so avoid full sun exposure. This rhizomatous perennial prefers moderate to high moisture, so choose a spot with consistently moist soil and good drainage to prevent root rot. Space plants about 1 to 2 feet apart since they can reach up to 3 feet tall. Plant in spring or fall when the Bay Area soil is naturally moist.
After Planting
Water regularly during your first growing season to keep soil consistently moist, especially through the summer months. Once established in year two, you can reduce watering to a moderate schedule, though this plant still prefers moisture over drought. The foliage may die back in winter as a dormant perennial - this is normal. The biggest mistake is letting the soil dry out completely; Royal Jacob's-ladder won't tolerate drought conditions, so check soil moisture weekly rather than waiting for visible wilting.
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Wildlife Supported
Birds
Early season nectar source during spring migration and breeding preparation
Insects
Early season pollen source for emerging bumblebee queens and workers
Host-specific pathogen affecting Polemonium species
Spring and early summer infection period
Primary infection period during cool, moist spring conditions
Primary spring pollen forager for native sweat bee species