Place Phacelia rotundifolia in locations where it can receive full morning sun and partial afternoon shade. This balances its light needs, giving it ample sunlight without exposing it to excessive heat during the hottest part of the day.

Monitor seasonal changes and adjust the plant's position accordingly. During summer, provide it with partial shade during peak sun to prevent stress. In winter, find a location with maximum sunlight exposure to support its growth.

Roundleaf phacelia (Phacelia rotundifolia)

Also known as: None

The plant features round leaves attached to petioles. Its inflorescence is a one-sided, curving or coiled cyme that is covered in hairs. The small, bell-shaped flowers, each about half a centimeter in length, range in color from white to purple and have a pale yellow throat.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Roundleaf phacelia

Lifespan

Annual

Plant Type

Herb

Plant Height

10 to 30 cm

Spread

Approximately 20 cm

Leaf Color

Green

Flower Size

1 to 2 cm

Flower Color

Blue to Purple

Images of Roundleaf phacelia

Quickly Identify Roundleaf phacelia

Roundleaf phacelia is characterized by its rounded leaves, small blue to purple flowers, and hairy stems. The flowers are clustered together near the top of the plant.

Scientific Classification of Roundleaf phacelia

Phylum

Vascular plants

Class

Dicotyledons

Order

Boraginales

Family

Waterleaf

Genus

Heliotrope

Species

Roundleaf phacelia

Planting and Growing of Roundleaf phacelia

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

6-12 hours

Ideal Temperature

60-70℉

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 Roundleaf phacelia?

The watering amount for Phacelia rotundifolia should be sufficient enough to moisten the soil evenly while avoiding waterlogging. It's essential to ensure the soil is moist to the touch, but not soggy, which could drown the plant. Generally, 250 ml per session is adequate for keeping its hydration needs satisfied.

What are the symptoms of an underwatered Roundleaf phacelia? ›

What should I do if my Roundleaf phacelia is not getting enough water? ›

What are the symptoms of an overwatered Roundleaf phacelia? ›

How to save an overwatered Roundleaf phacelia? ›

What Are the Sunlight Requirements for Roundleaf phacelia?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6-8 hours

Phacelia rotundifolia thrives best in full to partial sun, benefiting from 6-8 hours of sunlight. This balance allows sufficient photosynthesis, leading to vibrant blooms and healthy growth.

Optimal positioning ›

Use of reflective surfaces ›

Seasonal adjustments ›

What Is the Ideal Temperature Range for Roundleaf phacelia?

Ideal Temperature: 60 ~ 70℉

Phacelia rotundifolia thrives best in moderate temperatures. Ideally, keeping the temperature between 60°F and 70°F ensures optimal growth. These conditions mimic its natural habitat, providing the warmth necessary for proper photosynthesis and growth while avoiding stress associated with heat extremes.

What Soil is Best for Roundleaf phacelia?

Soil type: Sandy soil, Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Phacelia rotundifolia thrives in soils with good drainage. Proper drainage prevents waterlogging and root rot, ensuring healthy growth and vibrant foliage. Choosing a well-draining soil promotes robust root systems and enhances the plant's ability to absorb nutrients. This plant prefers soils of moderate fertility, where essential nutrients are available without excessive richness that might lead to lush growth but poor flowering. Balanced soil fertility ensures optimal flowering and increases the plant's resilience to environmental stresses. Loose soil textures facilitate root penetration and air exchange, which is crucial for Phacelia rotundifolia. Such conditions support vigorous root development and help the plant to anchor well, drawing ample nutrients and water efficiently.

How to Fertilize Roundleaf phacelia?

Fertilizer type: Balanced

For Phacelia rotundifolia, use a balanced fertilizer with an N-P-K ratio of 10-10-10. Apply diluted liquid fertilizer at half the recommended concentration to avoid over-fertilization, as this plant can be sensitive to excessive nutrients.

How to Prune Roundleaf phacelia?

Pruning Time: Spring, Autumn

During the pruning seasons, focus on removing any dead, damaged, or diseased stems. This helps improve air circulation within the plant, reducing the chances of fungal infections. To maintain a neat appearance, trim back any excessively long stems. This encourages the plant to develop a more compact, attractive shape and enhances its overall aesthetic appeal. More About Pruning Techniques→

How to Propagate Roundleaf phacelia plant?

Propagate Time: Spring, Early spring

Begin by filling the seed starting trays with potting soil, lightly compacting it to eliminate air pockets. Spread the Phacelia rotundifolia seeds evenly over the surface and cover them with a thin layer of soil, as they require light for germination.

After sowing, water the soil gently to ensure it is moist but not waterlogged. Maintain a consistent temperature of around 15-20°C (59-68°F) to facilitate germination, which typically occurs within two to three weeks.

Once seedlings have developed several true leaves, carefully transplant them to larger pots or directly into the garden. Choose a location with full sun and loose, well-drained soil to encourage robust growth.

More About Propagating Techniques→

How to Repot Roundleaf phacelia plant?

Repotting frequency: Every 2-3 years

Repot your Phacelia rotundifolia when you notice roots protruding from drainage holes, or if growth has slowed despite optimal care. These signs indicate that the plant has outgrown its current pot, and providing new space can invigorate its growth.

Choose a pot that is approximately 1-2 inches larger in diameter than the current one. This incremental increase ensures the roots have more room to expand without the risk of waterlogging, which can occur in overly large pots.

Opt for a well-draining sandy mix, allowing excess water to escape easily, mimicking this plant's natural habitats. This soil prevents root rot and ensures the plant receives enough oxygen, crucial for healthy growth.

Toxicity

N/A

WARNING

The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.