Coville's phacelia (Phacelia covillei)

Also known as: Coville's Phacelia

Coville's phacelia is a notable wildflower native to specific areas, favoring sunny, dry environments. It features unique clusters of vibrant blue to violet blossoms that sit atop thin, hairy stems. The plant's finely divided leaves add an intricate texture, complementing its colorful blooms. Well-suited to its tough habitat, Coville's phacelia grows best in well-drained soils and supports local ecosystems by attracting pollinators.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Coville's phacelia

Lifespan

Annual

Plant Height

5 to 30 centimeters

Spread

N/A

Leaf Color

Green

Flower Size

1 to 2 centimeters

Flower Color

Blue-violet

Images of Coville's phacelia

Quickly Identify Coville's phacelia

This plant can be identified by its blue-violet bell-shaped flowers, finely divided leaves, and hairy stems. The flowers are typically clustered at the end of the stems.

Scientific Classification of Coville's phacelia

Phylum

Vascular plants

Class

Dicotyledons

Order

Boraginales

Family

Waterleaf

Genus

Heliotrope

Species

Coville's phacelia

Planting and Growing of Coville's phacelia

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Partial sun

Sunshine Duration

4-8 hours

Ideal Temperature

60-70℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.2-7.5

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 Coville's phacelia?

Phacelia covillei needs to be watered until the soil is evenly moist but not soggy. The ideal is to aim for about 250 ml of water each time, making sure the water reaches the roots but does not cause waterlogging. This helps maintain a healthy root system and prevents issues related to overwatering.

What are the symptoms of an underwatered Coville's phacelia? ›

What should I do if my Coville's phacelia is not getting enough water? ›

What are the symptoms of an overwatered Coville's phacelia? ›

How to save an overwatered Coville's phacelia? ›

What Are the Sunlight Requirements for Coville's phacelia?

Sunlight Requirements: Partial sun

Duration of light: 4 to 6 hours

Phacelia covillei ideally enjoys partial sun, where it's exposed to 4 to 6 hours of sunlight each day. This optimal light range supports robust growth, flowering, and overall plant vitality, preventing light damage without depriving it of necessary energy.

What is the ideal light exposure for Phacelia covillei? ›

How can you ensure Phacelia covillei gets ideal lighting? ›

What benefits does Phacelia covillei gain from ideal lighting? ›

What Is the Ideal Temperature Range for Coville's phacelia?

Ideal Temperature: 60 ~ 70℉

Phacelia covillei thrives in a temperate climate, ideally between 60°F and 70°F. This range allows optimal growth and flowering, ensuring robust development while minimizing stress factors. Maintaining consistent temperatures within this range is crucial for achieving the best growth results.

What Soil is Best for Coville's phacelia?

Soil type: Loam, Sandy loam

Soil PH: 6.2 ~ 7.5

Phacelia covillei thrives in well-drained soils which prevent waterlogging. Good drainage ensures that the roots receive adequate oxygen and reduces the risk of root rot, enhancing plant health and growth. This plant prefers soils with moderate fertility. Adequate nutrients lead to vibrant growth and abundant flowering, which is critical for attracting pollinators to your garden. While well-drained, the soil should retain enough moisture to support sustained growth. Proper moisture retention ensures consistent development and minimizes stress during dry periods.

How to Fertilize Coville's phacelia?

Fertilizer type: Balanced

For Phacelia covillei, the recommended amount of fertilizer should be moderate. A balanced 10-10-10 NPK liquid fertilizer is ideal, applied by diluting roughly 5 milliliters per liter of water. For solid fertilizer, use approximately 50 grams per square meter. Apply care, as excess nutrients can harm the plant's delicate roots.

How to Prune Coville's phacelia?

Pruning Time: Spring, Summer

Begin by examining the plant's structure to identify any dead or diseased stems. Remove these parts first, cutting back to healthy tissue to promote recovery and prevent the spread of disease. Focus on cutting back overgrown stems to promote a more compact shape. Make cuts just above a node or bud, which will encourage new growth. It's important not to remove more than a third of the plant at any time to avoid shock. More About Pruning Techniques→

How to Propagate Coville's phacelia plant?

Propagate Time: Spring, Early summer

Choose a well-draining potting mix and fill the seed tray. This is crucial because Phacelia covillei requires a loose medium to germinate effectively. Lightly moisten the soil before sowing the seeds to maintain consistent moisture.

Scatter the Phacelia covillei seeds evenly over the tray. Cover them lightly with a thin layer of soil. The seeds should not be buried too deep as they need light exposure to germinate properly.

Place the seed tray in a warm, bright location away from direct sunlight. Maintain a temperature between 15°C to 20°C to encourage germination. Keep the soil consistently moist by misting it regularly.

More About Propagating Techniques→

How to Repot Coville's phacelia plant?

Repotting frequency: Every 2-3 years

The ideal time to repot Phacelia covillei is when you notice slowed growth, roots emerging from drainage holes, or soil compactness. Spring and summer are perfect, as the plant is actively growing and dormancy setbacks are minimal.

Choose a pot that offers both adequate drainage and appropriate room for growth, typically 1-2 inches larger in diameter. This will ensure the roots have enough space to expand, promoting healthier and more robust plant growth.

Opt for a well-draining potting mix, rich in organic matter. This soil type will maintain balanced moisture levels, reduces the risk of root rot, and supports the plant's natural growth cycle effectively.