Douglas' phacelia (Phacelia douglasii)
Also known as: Douglas's Phacelia
Douglas' phacelia is a striking wildflower featuring clusters of coiled, bell-shaped purple-blue flowers. These blooms emerge on slender, hairy stems and are complemented by fern-like, deeply lobed leaves. This plant flourishes in open, sunny locations and dry, well-drained soils. Its nectar-rich flowers are particularly attractive to pollinators such as bees and butterflies. The plant's vibrant presence and ecological significance highlight its adaptability and beauty in native landscapes.
In This Article
Attributes of Douglas' phacelia
Lifespan
Annual
Plant Type
Herb
Plant Height
Approximately 20-40 cm
Spread
Not applicable
Leaf Color
Green
Flower Size
Approximately 1-2 cm
Flower Color
Blue to purple
Images of Douglas' phacelia
Quickly Identify Douglas' phacelia
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Can be identified by its hairy stems and leaves, and its distinct small, blue to purple bell-shaped flowers arranged in a coil or cluster.
Scientific Classification of Douglas' phacelia
Phylum
Vascular plants
Class
Dicotyledons
Order
Boraginales
Family
Waterleaf
Genus
Heliotrope
Species
Douglas' phacelia
Planting and Growing of Douglas' phacelia
Care Difficulty
Easy
Watering Schedule
Every 4 days
Sunlight Requirements
Partial sun
Sunshine Duration
4-6 hours
Ideal Temperature
60-75℉
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 Douglas' phacelia?
When watering Phacelia douglasii, aim to provide approximately 250 ml per session. This amount ensures the water effectively reaches the root zone without causing waterlogging. Water until the soil is moist to the touch, but avoid oversaturation, which could suffocate the roots and lead to decay.
What are the symptoms of an underwatered Douglas' phacelia?
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What should I do if my Douglas' phacelia is not getting enough water?
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What are the symptoms of an overwatered Douglas' phacelia?
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How to save an overwatered Douglas' phacelia?
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What Are the Sunlight Requirements for Douglas' phacelia?
Partial sun provides Phacelia douglasii with optimal light integration, enhancing blooming, fragrance, and vigor by harmonizing energy absorption with heat moderation.
What is the best lighting for Phacelia douglasii?
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How to achieve ideal lighting?
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What are the benefits of ideal lighting?
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What Is the Ideal Temperature Range for Douglas' phacelia?
The ideal temperature range for Phacelia douglasii is between 60°F and 75°F. These temperatures closely mimic its natural habitat, ensuring optimal growth and flowering. Staying within this range encourages healthy foliage development and robust blooming periods.
What Soil is Best for Douglas' phacelia?
Phacelia douglasii thrives best in well-drained soils where water does not stagnate. This prevents root rot and other water-related diseases, ensuring healthy growth and vibrant flowering. A nutrient-rich loam that contains organic matter supplements Phacelia douglasii’s growth by providing essential nutrients. This encourages robust bloom and a healthy, lush appearance. Soils that allow for good aeration help the roots of Phacelia douglasii absorb adequate oxygen, promoting faster growth. This is crucial for uplifting the overall physiological processes of the plant.
How to Fertilize Douglas' phacelia?
Phacelia douglasii prefers a balanced approach to fertilization. It is best to use a dilute liquid fertilizer solution, typically at 1/4 to 1/2 the recommended strength on the label for most houseplants. When using granular or slow-release fertilizers, a general guideline is to apply about 1 tablespoon per plant every four months.
How to Prune Douglas' phacelia?
Use a pair of clean, sharp pruning shears to avoid damaging the plant. Ensure your tools are sanitized to prevent the spread of disease. Focus on removing dead, damaged, or diseased stems first. Look for any crossing branches which might be competing for space and light. Cut at a 45-degree angle about a quarter-inch above a healthy bud or outward-facing leaf node. This allows water to run off, reducing the chance of infection. Trim softly around the edges of the plant to encourage new growth. Pruning can help the plant focus its energy on developing strong, healthy blooms.
More About Pruning Techniques→
How to Propagate Douglas' phacelia plant?
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Collect seeds from mature Phacelia douglasii plants after the flowering period. Ensure that seeds are fully matured and dry them thoroughly before storage.
2
Sow the seeds evenly over a seed tray filled with moist retaining soil. Cover them lightly with a thin layer of soil and water gently to settle the soil without displacing the seeds.
3
Once the seedlings are large enough to handle and have developed their first true leaves, transplant them into individual pots or outdoors, ensuring a space of at least 12 inches between them for optimal growth.
How to Repot Douglas' phacelia plant?
1
Phacelia douglasii needs repotting when its roots start to crowd the container or when water drains too slowly, suggesting poor soil or root-bound conditions. Ideal times are early spring or early autumn, avoiding stress of extreme weather.
2
Select a pot that is 2-3 inches wider than the current one. It should have good drainage holes. A slightly larger pot encourages new growth while preventing waterlogging, which can lead to root rot.
3
Choose a well-draining potting mix, ideally with added sand or perlite to improve drainage. This type of soil supports healthy growth by preventing water from accumulating and causing root decay.
