Bottomland aster (Symphyotrichum ontarionis)

Also known as: Aster ontarionis, Ontario Aster

The Bottomland aster (Symphyotrichum ontarionis) is a perennial plant notable for its daisy-like flowers, which feature purple or lavender petals surrounding yellow centers, and bloom from late summer to early fall. Growing 1-3 feet tall, it has characteristic lance-shaped leaves that clasp the stem. This aster favors moist, fertile soils and is commonly found in low-lying areas such as floodplains, wetlands, and along stream banks. It thrives in full to partial sunlight and plays a vital role in its ecosystem by attracting a variety of pollinators.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Bottomland aster

Lifespan

Perennial

Plant Type

Herb

Plant Height

30 cm to 1.2 m

Spread

N/A

Leaf Color

Green

Flower Size

1-2 cm

Flower Color

White Yellow

Images of Bottomland aster

Quickly Identify Bottomland aster

Identifying this plant involves looking for lance-shaped leaves that are alternately arranged on the stem, with purplish-blue ray flowers and yellow centers, typically blooming in late summer to early fall.

Scientific Classification of Bottomland aster

Phylum

Vascular plants

Class

Dicotyledons

Order

Asterales

Family

Daisy

Genus

Asters

Species

Bottomland aster

Planting and Growing of Bottomland aster

Care Difficulty

Easy

Watering Schedule

Every 2 days

Sunlight Requirements

Full 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 Bottomland aster?

For Symphyotrichum ontarionis, the watering should be thorough, delivering about 500 ml each time. This allows the water to penetrate deeply into the soil, reaching the roots effectively without over-saturating the soil. A consistent moisture level helps prevent the roots from drying out or developing rot.

What are the symptoms of an underwatered Bottomland aster? ›

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

What are the symptoms of an overwatered Bottomland aster? ›

How to save an overwatered Bottomland aster? ›

What Are the Sunlight Requirements for Bottomland aster?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6-8 hours daily

Symphyotrichum ontarionis thrives in full sun to partial sun conditions, benefiting from bright, direct light. This promotes lush growth and vibrant flowering, enhancing its ornamental value.

What is the ideal amount of sunshine? ›

How can I help the plant achieve this? ›

What benefits does ideal sunlight provide? ›

What Is the Ideal Temperature Range for Bottomland aster?

Ideal Temperature: 60 ~ 75℉

The ideal temperature range for Symphyotrichum ontarionis is between 60°F and 75°F. These conditions mimic the moderate climates of its native habitats, providing the perfect environment for healthy growth and flowering.

What Soil is Best for Bottomland aster?

Soil type: Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Symphyotrichum ontarionis thrives in well-drained soil that prevents waterlogging, ensuring the roots receive oxygen. This is crucial for healthy growth and preventing root rot, which can severely affect plant vitality. A nutrient-rich soil provides essential minerals and organic matter that support robust growth and vibrant flowering. Incorporating compost or organic fertilizers can greatly benefit this plant by boosting soil fertility. Soil with moderate moisture retention balances the availability of water, preventing both drought stress and excess water issues. This soil characteristic ensures consistent hydration for the plant, particularly in warmer climates.

How to Fertilize Bottomland aster?

Fertilizer type: Balanced

For Symphyotrichum ontarionis, apply a balanced liquid fertilizer with an NPK ratio of 10-10-10. Use about 0.5 ounces per gallon of water during the active growing season.

How to Prune Bottomland aster?

Pruning Time: Spring, Summer

Begin by removing any dead or diseased branches to maintain the plant's health. Next, prune back leggy or unwieldy growth to maintain a compact shape. This encourages new shoots to develop and enhances aesthetic appeal. Conduct a more substantial pruning in early spring before new growth starts. This is the time to make adjustments to size and shape. Follow up with light trimming throughout the growing season to manage size and encourage flowering. More About Pruning Techniques→

How to Propagate Bottomland aster plant?

Propagate Time: Spring, Early spring, Late summer

Start by preparing a seed tray with a mix of peat and sand. Sow the seeds evenly and cover them lightly with soil. Water the tray gently to ensure moisture without waterlogging.

Select a healthy parent plant and cut a 4-6 inch section just below a node. Remove the lower leaves from the cutting and dip the cut end in rooting hormone before planting it in a mix of perlite and peat.

Carefully dig up a mature plant and separate it into several sections, ensuring each section has roots attached. Replant each division at the same depth it was growing initially.

More About Propagating Techniques→

How to Repot Bottomland aster plant?

Repotting frequency: Every 2-3 years

Look for signs such as roots emerging from drainage holes, soil compacted with little drainage, or slowed growth. These indicate it's time to repot. Optimal times are during active growth in spring or early autumn.

Select a pot that is one size larger than the current one and ensures good drainage. Using a pot with adequate drainage holes avoids soggy roots and promotes healthy growth. Clay pots can help prevent overwatering by allowing moisture to evaporate.

Choose a well-draining potting mix that holds moisture but doesn't remain soggy. A mixture with organic material like peat moss or compost along with perlite is beneficial and supports robust root development.