Hemp agrimony Eupatorium cannabinum

Water

Hemp agrimony prefers consistently moist soil, so it should be watered regularly. In the absence of rainfall, provide about an inch of water per week. It's best to water the plant at the base to avoid wetting the foliage, which can help prevent disease. Make sure the soil is well-drained to avoid waterlogging. During dry spells, it may require additional water, possibly up to twice a week, equating to about 2 gallons per week depending on soil conditions and temperature.

Light

Hemp agrimony thrives in full sun to partial shade. It prefers a spot that receives at least four to six hours of sunlight daily, but it can also grow well in dappled sunlight under taller trees. Avoid deep shade, as this can lead to poor growth and fewer flowers.

Temperature

Hemp agrimony does best in moderate climates and can tolerate temperatures as low as 20°F. It prefers a temperature range between 60°F and 75°F but can survive up to 90°F. Protecting the plant from extreme cold by mulching can help ensure its survival during winter months.

Pruning

Pruning hemp agrimony is primarily done to remove spent flower heads and encourage further blooming. It can be pruned in late winter or early spring to shape the plant and remove any dead or damaged stems. Pruning should occur annually to promote healthy new growth. The best time for pruning is when new growth appears at the base of the plant.

Cleaning

As needed

Soil

Hemp agrimony prefers a moisture-retentive, fertile soil with good drainage. The best soil mix should include loamy soil, peat, and a portion of sand or perlite to enhance drainage. The soil pH should be neutral to slightly alkaline, ranging from 6.5 to 7.2 for optimal growth.

Repotting

Hemp agrimony does not require frequent repotting and can be repotted every 2-3 years or when it has outgrown its current container. Always use a slightly larger pot and fresh, appropriate soil mix during repotting.

Humidity & Misting

Hemp agrimony thrives in areas with average to high humidity. It prefers a high humidity level around 60-80%, which can be found naturally in its wetland and riparian habitats.

Suitable locations

• Indoor

  Provide bright light and moist soil for indoor growth.

• Outdoor

  Plant in moist soil, partial to full sun exposure.

• Hardiness zone

  5-9 USDA

Life cycle

Eupatorium cannabinum, commonly known as Hemp-agrimony, begins its life cycle as a seed that germinates in spring, typically in moist soil conditions. After germination, the plant develops a rosette of leaves at the ground level. As it matures, the plant grows upright stems and produces more leaves, eventually reaching heights of up to 1.5 meters. By mid to late summer, Hemp-agrimony produces clusters of tiny, pinkish-purple flowers that are attractive to a variety of pollinators including bees and butterflies. Following pollination, the flowers develop into small seeds that are dispersed by wind and water. The plant dies back in winter, but can re-emerge from its hardy perennial rootstock the following spring.

Propogation

• Propogation time

  Spring-summer

• Eupatorium cannabinum, commonly known as hemp-agrimony, is best propagated in late spring or early summer using softwood cuttings. This popular method involves taking a cutting of about 6 inches (approximately 15 centimeters) from the tip of a healthy, non-flowering stem. The leaves at the lower part of the cutting should be removed, and the cut end may be dipped in a rooting hormone to enhance root development. The cutting should then be placed into a well-draining mix of soil and kept in a warm, humid environment until roots have developed, which typically takes a few weeks. Regular misting and keeping the soil consistently moist but not waterlogged are crucial during this time. Once rooted, the cuttings can be potted on or planted into their final positions.