Overview
Mimosa borealis Gray, also commonly known as pink sensitive plant, is a species of mimosa native to North America. It is a wildflower found in the western part of the United States and Canada, growing in the prairies and grasslands.
General Appearance
The pink sensitive plant is a small herbaceous plant that is an annual. It grows up to 30 cm tall and has delicate, fern-like leaves that are light green in color. The leaves are sensitive to touch and will fold inward when gently touched. The flowers are a light pink color and are produced in small clusters.
Uses
Mimosa borealis Gray is a popular ornamental plant, commonly used in pollinator gardens for its attractive blooms that attract pollinators such as butterflies and bees. Additionally, the plant is used in traditional medicine to treat various ailments such as headaches, inflammation, and fever. The plant is also edible, and the leaves and flowers can be used in salads or cooked as greens.
However, it should be noted that the plant contains toxic compounds that can cause skin irritation and allergic reactions in some people. Therefore, caution should be exercised when handling the plant.
Light Requirements
Mimosa borealis Gray requires bright, direct sunlight for optimal growth. It can tolerate a few hours of partial shade, but prolonged shade can stunt its growth and make it more susceptible to diseases. Therefore, the plant should be placed in a location that receives at least six hours of full sun daily, such as a south-facing window or a sunny outdoor spot.
Temperature Requirements
Mimosa borealis Gray thrives in warm temperatures and can withstand mild frosts in winter. Ideally, the plant should be kept at a room temperature of 68-75°F (20-24°C) during the day and 60-65°F (15-18°C) at night. Sudden temperature fluctuations or drafts can stress the plant and cause leaf drop.
Soil Requirements
Mimosa borealis Gray prefers well-draining, sandy or loamy soil that is rich in organic matter. The soil pH should be slightly acidic, between 5.5 and 6.5. The plant does not tolerate waterlogged soil or standing water, as this can cause root rot and fungal diseases.
It is recommended to add perlite or coarse sand to the soil mix to improve drainage and aeration. Additionally, the plant should be potted in a container that has drainage holes at the bottom to prevent water from accumulating at the root level.
Cultivation
Mimosa borealis Gray, also known as the Rocky Mountain mimos, can thrive in a wide range of soil types, including sandy, loamy, and clay soils. It prefers a well-draining soil that is slightly acid to neutral in pH.
This plant needs a full sun to part shade position. If you're planting seedlings, make sure to space them about 1-2 feet apart since they tend to grow quite bushy. Generally, they grow up to 3-4 feet tall and wide.
Watering Needs
In its natural habitat, Mimosa borealis Gray grows in areas that receive snow and rain, so it doesn't require frequent watering. However, it's essential to water it once it's planted, particularly during the first month or until it's established. Afterward, you can water it periodically when the soil is dry to the touch.
Fertilization
While not necessary, fertilizing your Mimosa borealis Gray once or twice a year can encourage proper growth. Use a balanced fertilizer and apply according to the package instructions. You can apply it during the growing season in the spring or summer.
Pruning
Pruning is not essential for Mimosa borealis, but you may want to trim it back to a desired shape or size. Prune it in late winter or early spring before it starts producing new growth. Cut back any dead, diseased, or crossing branches to promote healthy growth. Remove damaged or weak stems to keep the plant looking presentable.
Propagation of Mimosa borealis Gray
Mimosa borealis Gray, commonly known as the fragrant mimosa, can be propagated by various methods such as, seeds, cuttings, layering, and division.
Propagation by Seeds
The easiest and most common method of propagating Mimosa borealis Gray is through seeds. The seeds can be sown in early spring in seed trays or outdoor plots. Before sowing, stratification of the seeds is required by soaking them in water for 24 hours and putting them in a refrigerator for 6 weeks. The seeds should then be sown about an inch deep in well-draining soil that is regularly watered until the seedlings emerge. The seedlings can be transplanted to their permanent location once they have developed 4-5 sets of leaves.
Propagation by Cuttings
The propagation of Mimosa borealis Gray by cuttings is also possible. The best time to take cuttings is in late summer. A 4-6 inch cutting is taken from a healthy plant and is treated with a rooting hormone before being planted in well-draining soil. The cutting should be kept moist and covered with a plastic bag to maintain humidity until roots have formed. Once roots have formed, the plant can be transplanted to its permanent location.
Propagation by Layering
Layering is another method commonly used for the propagation of Mimosa borealis Gray. This method involves bending a low hanging branch and burying that section of the branch in the soil until it develops roots. Once the roots have developed, the branch can be cut from the parent plant and transplanted to its permanent location.
Propagation by Division
Division is the process of separating an established plant into multiple plants. The best time to divide a Mimosa borealis Gray plant is in early spring. The parent plant can be lifted from the ground and then separated into smaller sections, ensuring each section has enough roots. Once separated, the sections can be planted into their permanent locations.
Disease and Pest Management for Mimosa borealis Gray
Mimosa borealis Gray, commonly known as fragrant mimosa, is a small shrub that is found in North America. This plant does not suffer from many diseases or pests, but it is susceptible to a few. Here are some common diseases and pests that might affect the plant and the ways to manage them:
Diseases
Mimosa wilt is a fungal disease that can cause the foliage of the plant to turn yellow and wilt. It can also result in the plant's death. To manage this disease, prune any infected parts of the plant and ensure that the soil around the plant is well-drained.
Canker is another fungal disease that can cause the plant to develop brownish spots on the bark. To manage this disease, prune any infected areas and make sure that the plant has access to enough sunlight and water.
Pests
Spider mites, aphids, and whiteflies are the most common pests that can affect mimosa borealis. These pests can cause damage to the plant's foliage, including stunted growth, yellowing, and distortion. To manage these pests, use an insecticidal soap or neem oil, and make sure to remove any affected leaves or branches from the plant.
In summary, mimosa borealis Gray is generally a healthy plant that is not susceptible to many diseases or pests. However, it is important to be aware of the few that can affect it and take appropriate measures to manage them.
