Species Cliff Paintbrush
red-yellow flowers with burgundy leaves and grey stems

Cliff Paintbrush

Castilleja rupicola

Also Known As - Cliff Indian Paintbrush
Cliff Paintbrush, also known as Castilleja rupicola, is an exceedingly rare and endangered species of wildflower. Growing 1-3 feet in height, it is mainly found atop the steep coastal cliffs and rock formations of the Big Sur region in California. Its leaves are long and narrow, with small woolly hairs, and its white, red and yellow-orange flowers are clustered in broom-like heads. Cliff Paintbrush can tolerate intense sunlight, cold, and wind, and its roots spread along rocky surfaces, where they can soak up moisture. The species is important as it helps to stabilize cliffs and reduce erosion, as well as provide food for pollinators such as the endangered Least Bell's Vireo. Cliff Paintbrush plays a crucial role in coastal ecosystems, so it’s crucial to protect and conserve it.

Watering:

Average

Propagation:

Seed Propagation,Seed Propagation,Seed Propagation,Cutting,Division,Layering Propagation

Hardiness Zone:

Flowers:

Red Flowers

Sun:

full sun

Leaf:

Yes

Leaf Color:

green,yellow,gray,gray

Growth Rate:

Low

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Care Level:

Medium

watering

During the spring and summer months, the Cliff Paintbrush should be watered deeply once every week or 2, ensuring that the soil is thoroughly saturated (not just moist). During the fall and winter months, water once every 3 to 4 weeks. During periods of extreme heat or drought, additional watering may be necessary. Soak the soil deeply until you see water running out of the drainage holes at the bottom of the pot. It’s important to keep the soil slightly moist at all times and avoid overwatering.

sunlight

Cliff Paintbrush (Castilleja rupicola) is an alpine plant species adapted to thrive in full sun in areas where temperatures and rainfall are relatively low. This species prefers lots of full-sun exposure and does best in bright, sunny locations with at least 6–8 hours of direct sunlight each day. It is important to keep the Cliff Paintbrush well-watered when it is grown in full sun, as this can lead to rapid drying.

pruning

Cliff Paintbrush plants should be pruned in the late winter when they are dormant. This will help ensure the plants remain healthy and promote new growth. Pruning should be done to remove dead, damaged, or overgrown branches and stems. This will help open up the plant and allow more light and air to reach the inner branches, allowing for healthy growth. When pruning Cliff Paintbrush, keep the overall shape of the plant in mind. It's important not to prune too drastically as this can damage the plant. Leave enough foliage to support the plant's health and encourage new growth. It's important to also use the correct tools when pruning, such as sharpened shears or handsaws. This will help ensure the plant is neatly and safely pruned. Finally, pruning is also a good time to check for any pests, disease, or other problems. Look for signs of infection, such as discolored or wilted foliage, or any signs of pests, such as moss. If any of these are found, try to remove the affected areas and treat accordingly.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Cliff Paintbrush typically starts flowering in April.