Stokes' aster (Stokesia laevis)

Also known as: Cornflower aster

Stokesia laevis, commonly known as Stokes' aster, is a perennial plant named in honor of botanist and physician Jonathan Stokes. This plant is known for its ability to attract pollinators like bees and butterflies. One of its unique features is the way its petals can transition from white to purple, adding dynamic color to any garden.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Stokes' aster

Lifespan

Perennial, Annual

Plant Type

Herb

Plant Height

30 cm to 60 cm

Spread

30 cm to 45 cm

Leaf Color

Green

Flower Size

4 cm to 10 cm

Flower Color

White Blue Purple Pink Lavender Violet

Images of Stokes' aster

Quickly Identify Stokes' aster

Deep blue or white flowers up to 5 inches (12.7 cm) wide.

Lance-shaped leaves forming a lush foliage rosette up to 6 inches (15 cm) long.

Scientific Classification of Stokes' aster

Phylum

Vascular plants

Class

Dicotyledons

Order

Asterales

Family

Daisy

Genus

Stokes' aster

Species

Stokes' aster

Planting and Growing of Stokes' aster

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Ideal Temperature

65-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

5.5-7.5

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 Stokes' aster?

For Stokesia laevis, ensure the soil is evenly moist but not soggy. You should aim to provide about 500ml of water per session. Water deeply until the soil feels moist down to a depth of 6 to 8 inches. This allows the roots to develop strong networks deep in the soil, preparing them to withstand periods of drought.

What are the symptoms of an underwatered Stokes' aster? ›

What should I do if my Stokes' aster is not getting enough water? ›

What are the symptoms of an overwatered Stokes' aster? ›

How to save an overwatered Stokes' aster? ›

What Are the Sunlight Requirements for Stokes' aster?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours daily

Stokesia laevis prefers a light range from partial to full sun, optimizing its growth and bloom potential with 6 to 8 hours of sunlight daily.

Optimal Light Conditions for Growth ›

Ensuring Adequate Sun With Potential Obstacles ›

Benefits of Optimal Sunlight Exposure ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Stokes' aster?

Ideal Temperature: 65 ~ 75℉

Stokesia laevis thrives best in temperatures ranging from 65°F to 75°F. This range provides an optimal environment for the plant to grow vigorously, maintain its health, and produce vibrant blooms. Within these temperatures, the plant can effectively perform photosynthesis and energy transfer, essential processes for its development and flowering.

What Soil is Best for Stokes' aster?

Soil type: Sandy soil, Loam, Sandy loam

Soil PH: 5.5 ~ 7.5

Stokesia laevis thrives in well-drained soil, which ensures roots are not waterlogged. This promotes healthy growth and prevents root rot, a common issue in poorly drained soils. The plant prefers soil of moderate fertility, which provides essential nutrients without over-fertilization. This balance supports vibrant blooms without causing nutrient burn. Slightly acidic conditions are ideal for Stokesia laevis, enhancing nutrient absorption. This ensures robust foliage and abundant flowering, enhancing the plant's overall vitality. More About Soil→

How to Fertilize Stokes' aster?

Fertilizer type: Balanced

Stokesia laevis prefers a balanced application of nutrients. For liquid fertilizers, a concentration that provides around 150 ppm of nitrogen is suitable. For slow-release fertilizers, use about one tablespoon per square foot. Always follow the fertilizer's instructions for specific amounts. More About Fertilizing Techniques→

How to Prune Stokes' aster?

Pruning Time: Spring, Summer, Autumn

Look for wilted or faded flowers. Removing these deadheads helps direct the plant's energy into producing new blossoms and extending the blooming period. Check for and promptly trim away any broken or diseased stems to prevent the spread of infections and to keep the plant healthy and thriving. Cut back any overly long or errant stems to maintain the desired shape of the plant. This not only improves aesthetics but also promotes a more uniform growth pattern. More About Pruning Techniques→

How to Propagate Stokes' aster plant?

Propagate Time: Spring, Late spring, Early spring

Begin by filling seed trays or pots with a well-draining potting mix. Moisten the soil lightly to ensure it’s ready to support germination but avoid waterlogging, which can cause seed or cutting rot.

Sow seeds evenly across the surface of the soil and lightly cover them with a thin layer of soil. For cuttings, remove the lower leaves and dip the cut end in rooting hormone before placing it into the soil.

Place the seed trays or cutting pots in a location with indirect sunlight and maintain a temperature between 20-25°C. Ensure the medium remains moist through regular misting but avoid making it too wet.

More About Propagating Techniques→

How to Repot Stokes' aster plant?

Repotting frequency: Every 2-3 years

Stokesia laevis shows it needs repotting when its roots begin to protrude from the drainage holes or it seems to be outgrowing its container. Additionally, if the soil dries out very quickly after watering, it's a sign that the plant's roots have occupied most of the pot. Ideally, repot during spring or autumn to minimize stress on the plant.

Select a pot that is only slightly larger than the current one, ideally 1-2 inches in diameter larger. It should have adequate drainage holes to prevent waterlogging, which can lead to root rot. A well-sized pot encourages healthier root growth and prevents the problem of excess soil retaining moisture for too long.

Opt for a well-draining, loamy soil mix that includes components like peat, sand, and perlite. This mix provides excellent aeration and drainage while retaining adequate moisture, ensuring the roots are neither waterlogged nor deprived of necessary hydration. Such soil supports robust growth and flowering.