Coast rock cress (Arabis blepharophylla)

Also known as: Rose rockcress, Fringed rockcress

*Arabis blepharophylla*, or coast rockcress, is a perennial herb native to California. This plant blooms with vibrant purple flowers from winter to spring. It plays a crucial role in supporting butterfly populations, serving as a host for species such as the marble gray, spring white, and Pacific orang-tip butterflies.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Coast rock cress

Lifespan

Perennial

Plant Type

Herb

Plant Height

30 cm

Spread

40 cm

Leaf Color

Green

Flower Size

1.02 cm to 2 cm

Flower Color

Purple Pink

Images of Coast rock cress

Quickly Identify Coast rock cress

Arabis blepharophylla can be identified by its lanceolate leaves that have fringed margins and its bright pink to reddish flowers which bloom in spring. It typically forms low-growing mats.

Scientific Classification of Coast rock cress

Phylum

Vascular plants

Class

Dicotyledons

Order

Brassicales

Family

Cruciferae

Genus

Rockcresses

Species

Coast rock cress

Planting and Growing of Coast rock cress

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

6-8 hours

Ideal Temperature

50-70℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-7.5

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

2 times a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Coast rock cress?

Arabis blepharophylla requires a moderate watering approach, with about 250 milliliters per session. Ideally, the soil should be moistened evenly, ensuring it feels damp but not soaked. The goal is to mimic its natural habitat conditions, providing enough moisture for root absorption without causing waterlogging.

What are the symptoms of an underwatered Coast rock cress? ›

What should I do if my Coast rock cress is not getting enough water? ›

What are the symptoms of an overwatered Coast rock cress? ›

How to save an overwatered Coast rock cress? ›

What Are the Sunlight Requirements for Coast rock cress?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 4-6 hours daily

Arabis blepharophylla prefers partial to full sun exposure. Ideal light helps develop rich-colored foliage and support healthy flowering, enhancing the plant's ornamental value.

What are the optimal sun conditions for Arabis blepharophylla? ›

How can you ensure Arabis blepharophylla gets these lighting conditions? ›

What benefits does ideal lighting bring to Arabis blepharophylla? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Coast rock cress?

Ideal Temperature: 50 ~ 70℉

Arabis blepharophylla thrives best in a consistent temperature range between 50°F and 70°F. This range allows for optimal metabolic activities, encouraging lush foliage and vibrant blooms which are typical characteristics of a healthy plant. Maintaining this temperature ensures that Arabis blepharophylla achieves its full decorative potential.

What Soil is Best for Coast rock cress?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Arabis blepharophylla thrives in well-drained soil. This is crucial to prevent root rot, a common issue when water doesn't drain properly, suffocating the roots. Well-drained loamy soil ensures roots get the moisture they need without waterlogging. This plant benefits from nutrient-rich soil, which supports vigorous growth and flowering. Providing a base of nutritious soil enhances the plant's overall health and its ability to resist pests and diseases. Arabis blepharophylla prefers soil that retains some moisture but doesn't stay consistently wet. This balance helps the plant absorb the necessary nutrients while preventing the stress of excess water.

How to Fertilize Coast rock cress?

Fertilizer type: Balanced

For Arabis blepharophylla, it is recommended to apply liquid fertilizers at half the strength as recommended for flowering plants. Use approximately 10ml of fertilizer per liter of water. Solid fertilizers should be applied sparingly, about 20 grams per square meter.

How to Prune Coast rock cress?

Pruning Time: Spring, Summer, Autumn

Start by removing any dead or diseased stems to promote healthier growth. Trim back about a third of the plant to maintain its shape and encourage bushiness. Always cut just above a leaf node to support the development of fuller foliage. Ideal times for pruning Arabis blepharophylla are early Spring and late Summer. This timing helps in setting the plant up for a robust growing season and ensures it retains its aesthetic in the cooler months. More About Pruning Techniques→

How to Propagate Coast rock cress plant?

Propagate Time: Spring,Early spring

Use a well-draining potting mix to fill your seed trays or pots. Ensuring good drainage is crucial to prevent root rot and assist in healthy seedling development.

For seed propagation, scatter seeds over the soil surface and cover with a thin layer of soil. For cuttings, cut a healthy stem just below a node and strip the lower leaves.

Water gently to moisten the soil without washing away seeds or dislodging cuttings. Keep the soil consistently moist but not waterlogged throughout the germination or root formation period.

More About Propagating Techniques→

How to Repot Coast rock cress plant?

Repotting frequency: Every 1-2 years

Arabis blepharophylla should be repotted when you notice the roots growing out of the drainage holes or if the plant becomes top-heavy and water drains too quickly. It's a clear sign the plant has outgrown its pot. The best time to repot is during its growing seasons in spring or autumn when the plant can easily recover from stress.

Select a pot that is one size larger than the current one, ensuring it has good drainage holes. This prevents waterlogging, which can cause root rot. A medium-height pot works best for aesthetically balancing the plant's cascading foliage and allowing room for root expansion.

An ideal soil mix should be well-draining and sandy, rich in organic matter to support growth. This composition prevents water retention and facilitates nutrient absorption. The mix should mimic their natural rocky and well-drained habitats, promoting optimal growth and health.