Marsh-elder (Cyclachaena xanthiifolia)

Also known as: Giant Ragweed, Tall Ragweed, Annual Ragweed, Great Ragweed

The plant you're referring to is likely the Bottlebrush (Callistemon). This plant produces clusters of brush-like, hairy flowers and is free of spines. It's popular among honey bees, which visit to collect pollen. Bottlebrush plants are often found in gardens and landscapes.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting Toxicity

Attributes of Marsh-elder

Lifespan

Annual

Plant Type

Herb

Plant Height

61 cm to 1.8 m

Spread

Not typically measured, as it is a herbaceous plant

Leaf Color

Green

Flower Size

2.5 cm

Flower Color

Yellow Green

Images of Marsh-elder

Quickly Identify Marsh-elder

Giant Ragweed can be identified by its tall stature, often reaching up to 3 meters, large, deeply lobed leaves, and its greenish flowers which form in spike-like clusters at the top of the stem.

Scientific Classification of Marsh-elder

Phylum

Vascular plants

Class

Dicotyledons

Order

Asterales

Family

Daisy

Genus

Cyclachaena

Species

Marsh-elder

Planting and Growing of Marsh-elder

Care Difficulty

Easy

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

4-6 hours

Ideal Temperature

68-77℉

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 Marsh-elder?

For Cyclachaena xanthiifolia, ensuring the soil remains slightly moist is deeply crucial. This calls for watering until the moisture percolates down to a depth of approximately 6 to 8 inches, ensuring healthy root growth without ever allowing the plant to sit in soggy conditions.

What are the symptoms of an underwatered Marsh-elder? ›

What should I do if my Marsh-elder is not getting enough water? ›

What are the symptoms of an overwatered Marsh-elder? ›

How to save an overwatered Marsh-elder? ›

What Are the Sunlight Requirements for Marsh-elder?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6 to 8 hours

Cyclachaena xanthiifolia flourishes in full to partial sunlight conditions, experiencing robust growth and blooming when exposed to 6 to 8 hours of light. This ensures energy efficiency and healthy development.

Optimal Sunlight for Cyclachaena xanthiifolia ›

Solutions for Accessing Optimal Light ›

Benefits of Ideal Sunlight for Cyclachaena xanthiifolia ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Marsh-elder?

Ideal Temperature: 68 ~ 77℉

Cyclachaena xanthiifolia thrives best within temperatures ranging from 68°F to 77°F. This range provides both warmth and stability, supporting optimal growth and development. Fluctuations in this range can promote healthy leaf production and blooming without stressing the plant.

What Soil is Best for Marsh-elder?

Soil type: Sandy soil, Loam, Sandy loam

Soil PH: 6.5 ~ 7.5

Cyclachaena xanthiifolia thrives in well-drained soil, preventing root rot and ensuring the plant can absorb necessary nutrients efficiently. A soil enriched with organic matter supports the vigorous growth of Cyclachaena xanthiifolia, providing it with essential minerals for best health. Balanced moisture retention in soil ensures that Cyclachaena xanthiifolia maintains optimal hydration without the risk of waterlogging.

How to Fertilize Marsh-elder?

Fertilizer type: Balanced

Cyclachaena xanthiifolia requires a moderate amount of fertilizer to thrive. For liquid fertilizers, use a balanced formula with an N-P-K ratio of 10-10-10, diluting it to half strength. Apply about 250 ml per plant, ensuring not to over-saturate the soil. For slow-release fertilizers, use approximately 50 grams per plant spread evenly around the root zone to ensure consistent nutrition.

How to Prune Marsh-elder?

Pruning Time: Spring, Summer, Autumn

Begin by identifying the oldest, longest, and most crowded stems. These are the parts that need pruning to encourage healthy growth and maintain the plant's shape. Always use sharp, clean pruning shears to make precise cuts. Make your cuts at a 45-degree angle, just above a bud facing outward. This method helps direct the growth of new shoots away from the center of the plant, promoting better air circulation and reducing the risk of fungal infections. More About Pruning Techniques→

How to Propagate Marsh-elder plant?

Propagate Time: Spring, Early summer, Late summer

Collect mature seeds from healthy plants in late summer or early autumn when the seed heads are dry. Ensure the seeds are free from pests and diseases to increase the chances of successful propagation.

Fill the seed tray with a well-draining soil mix, leaving about 1 cm of space from the top. Moisten the soil lightly, ensuring it is damp but not waterlogged, to provide ideal conditions for seed germination.

Sprinkle the seeds evenly over the surface of the soil. Cover them lightly with a thin layer of soil mix or vermiculite, barely covering the seeds as they need light to germinate. Maintain constant moisture by misting the surface with water.

How to Repot Marsh-elder plant?

Repotting frequency: Every 2-3 years

Cyclachaena xanthiifolia signals it's time for repotting when you see roots growing out of the drainage holes, or the plant looks top-heavy and seems unable to retain moisture properly. Spring or early summer is usually ideal since the plant is gearing up for its active growth period.

Select a pot that's one size larger than the current one, with good drainage. This allows the roots to spread comfortably without excess soil that could retain too much moisture, reducing the risk of root rot.

Opt for a well-draining loamy mix enhanced with organic matter. This type of soil helps prevent waterlogging and provides the plant with essential nutrients, fostering healthy growth.

Toxicity

Ingestion

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.