Origin
Bidens hillebrandiana (Drake) O. Deg. ssp. hillebrandiana, commonly known as Hillebrand's beggarticks, is a perennial herbaceous plant that is native to Hawaii and can be found growing on the islands of Kaua'i, O'ahu, Moloka'i, Maui, and Hawai'i.
Common Names
In addition to Hillebrand's beggarticks, this plant is also commonly known as Hillebrand's bur-marigold, Hillebrand's sticktight, and Hillebrand's tickseed.
Uses
Traditionally, Bidens hillebrandiana has been used by Hawaiian healers to treat a variety of ailments, ranging from stomach aches to skin irritations. In modern times, this plant is mostly appreciated for its ornamental value and is often grown in gardens for its sunny yellow flowers and attractive foliage.
General Appearance
Bidens hillebrandiana is a low-growing plant that typically grows to a height of 30-60 cm. It has pale green leaves that are divided into three segments and are covered with small hairs. The plant produces numerous bright yellow flowers that are approximately 1-2 cm in diameter and have a flat central disk surrounded by several ray flowers. The small size of the flowers and their drooping habit give the plant a delicate and dainty appearance.
Light
Bidens hillebrandiana (Drake) O. Deg. ssp. hillebrandiana typically prefers full sun to partial shade. It requires at least 6 hours of direct sunlight exposure every day for optimal growth. However, in areas with hot climates, the plant can benefit from some afternoon shade to prevent leaf scorching.
Temperature
This plant prefers temperatures between 60°F to 80°F (15°C to 27°C) for optimal growth. While it can tolerate some frost, it is best to avoid prolonged exposure to freezing temperatures. Extremely high temperatures can also stress the plant, so it is crucial to provide adequate irrigation during hot weather conditions.
Soil
Bidens hillebrandiana (Drake) O. Deg. ssp. hillebrandiana grows best in well-draining soil since it does not tolerate standing water. This plant prefers fertile soil with high organic content, and the pH level should ideally be between 6.0 and 7.5. Adding compost to the soil can improve soil drainage and fertility, and provides some of the nutrients required to support plant growth.
Cultivation of Bidens Hillebrandiana
Bidens hillebrandiana (Drake) O. Deg. ssp. hillebrandiana is a small perennial herb that is native to Hawaii. It is an ideal plant for rock gardens, pots, hanging baskets, and borders, and can be grown both outdoors and indoors. It prefers a well-draining soil mixture that is rich in organic matter and slightly acidic. The plant requires full sunlight to partial shade to thrive.
Watering Needs
Watering is an essential aspect of Bidens hillebrandiana's care. This plant requires moderate watering, and the soil should never be allowed to dry out completely. Over-watering should be avoided as it can lead to root rot. It is best to water the plants in the morning or evening, as watering in the afternoon can cause damage to the leaves due to the intense heat of the sun.
Fertilization
Fertilization is another essential aspect of Bidens hillebrandiana's care. The plant should be fertilized every two weeks with a balanced fertilizer that is rich in nitrogen, phosphorus, and potassium. It is best to feed the plant during the growing season, which is from spring to fall. Over-fertilization should be avoided as it can lead to excessive foliage growth and reduced flowering.
Pruning
Pruning is an essential aspect of maintaining the health and beauty of Bidens hillebrandiana. It requires regular pruning to maintain its shape and remove dead or damaged leaves. Pruning should be carried out after flowering, and the plant should not be pruned heavily as this can lead to reduced flowering. The best approach is to prune lightly to maintain its shape.
Propagation of Bidens hillebrandiana
Bidens hillebrandiana (Drake) O. Deg. ssp. hillebrandiana, also known as Hillebrand's bur-marigold, is a Hawaiian endemic plant that belongs to the Asteraceae family. It is a short-lived perennial or annual with yellow flowers that bloom in the summer and fall. Bidens hillebrandiana can be propagated by several methods, including seeds, stem cuttings, and division.
Propagation by Seeds
The easiest and most common method of propagating Bidens hillebrandiana is by seeds. Collect the seeds from matured plants in the fall, store them in a cool and dry place until spring, and sow them in a well-draining potting mix. Cover the seeds lightly with soil or vermiculite and keep them moist. The seeds will germinate in 7 to 14 days if kept in a warm, bright location and watered regularly. Once the seedlings are big enough to handle, transplant them into individual containers and place them in a sunny spot.
Propagation by Stem Cuttings
Another way of propagating Bidens hillebrandiana is through stem cuttings taken during the summer. Using a clean and sharp pair of scissors, cut a 4-inch long stem from the parent plant and remove the leaves from the bottom third of the stem. Dip the cut end in rooting hormone powder and plant it in a container filled with moist potting mix. Cover the container with plastic wrap to increase humidity and keep the cutting moist. Place the container in a warm and bright location, but out of direct sunlight. The cutting should take root in 3 to 4 weeks, and once it has developed roots, transplant it into a larger container or the garden.
Propagation by Division
Bidens hillebrandiana can also be propagated by division in the spring when new growth appears. Dig up the parent plant and gently separate the roots into smaller sections. Each division should have at least one shoot and a good amount of root system. Replant the divisions in a well-draining potting mix or directly into the garden, and water thoroughly. Keep the divisions in a shaded area for a few days to allow them to recover from the transplant shock before moving them into their permanent location.
Disease and Pest Management for Bidens hillebrandiana (Drake) O. Deg. ssp. hillebrandiana
Bidens hillebrandiana (Drake) O. Deg. ssp. hillebrandiana, commonly known as Hillebrand's beggartick, is a resilient plant species. However, there are still some common diseases and pests that can affect it. Disease and pest management strategies are essential in maintaining the health and vitality of this plant.
Common Diseases
Leaf Spot is a common fungal disease that can affect Bidens hillebrandiana. It causes the brown spots on the leaves, which later expand and turn dark brown. To manage this disease, remove the affected leaves and destroy them. Avoid overhead watering and provide good air circulation to prevent the disease from spreading.
Powdery mildew can also affect this plant, especially in humid environments. Infected leaves appear coated with white powdery substance that gradually spreads, weakening the plant. To control powdery mildew, prune the infected parts and spray with an appropriate fungicide.
Common Pests
Spider mites are common pests that can affect Bidens hillebrandiana. These tiny pests are usually found on the undersides of the leaves and cause extensive damage by sucking the sap from the leaves. To control spider mites, spray the plant with a suitable miticide.
Aphids can also be a problem for Bidens hillebrandiana. They pierce the leaves and suck the sap from the plant, causing distortion and yellowing of the leaves. To manage aphids, use an appropriate insecticide or spray the plant with a strong blast of water to dislodge them.
Snails and slugs can cause significant damage to this plant species. They feed on the leaves and stem, leaving behind irregular holes. To manage them, handpick and destroy them or set up traps to capture them. You can also use baits such as beer or copper strips around the plants to repel them.
Regular monitoring is essential in preventing and managing diseases and pests. Proper care, including proper watering, fertilizing, and pruning, will help keep this plant healthy and resilient.
