Origin
Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff, commonly known as k?lea or Hawaiian aralia, is a species of flowering plant that is endemic to Hawaii. It is found on the islands of Kaua?i, O?ahu, Moloka?i, Maui, and Hawai?i, mostly in wet forests at elevations between 100 and 1800 meters.
Common Names
Aside from k?lea and Hawaiian aralia, Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff has several other common names including ?ohe, ?ohe k?lea, and ohe kukuna.
Uses
The plant is known for its medicinal properties and traditionally used by Hawaiians to treat various ailments such as rheumatism, asthma, and fever. Its leaves and stems are also used for making lei and used in hula dances. In addition, its wood is used for making durable tools and weapons, including fishing net needles, spears, and paddles.
General Appearance
Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff is a large shrub or small tree that can grow up to 7 meters tall. It has smooth gray bark and large, umbrella-shaped leaves that can be up to 60 cm long and 30 cm wide. The flowers of the plant are small and are followed by bunches of green berries that turn purple-black when mature.
Light Requirements
Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff typically prefers moderate shade but can also tolerate full sun. Too much direct sunlight can scorch its leaves while insufficient light can result in a smaller plant with fewer leaves.
Temperature Requirements
This plant can thrive in a wide range of temperatures, but prefers a stable warm to hot environment between 65 to 85 °F (18 to 29 °C). Be sure to protect the plant from frost as it is not frost tolerant.
Soil Requirements
Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff grows well in rich, well-draining soil mixes, such as those that contain a good proportion of bark, perlite or vermiculite, and sphagnum peat moss. A good soil mix should be light and airy. This plant also prefers moist but not waterlogged soil. It can tolerate mild acid to mildly alkaline soil conditions with a pH of around 5.5 to 7.5.
Cultivation
Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff, commonly known as 'ohe'e, is a native plant from Hawaii and requires warm temperatures to grow well. It is necessary to grow the plant in well-draining soil with a pH of 5.0 to 6.5. The plant thrives in full or partial shade, and it's crucial to protect it from the direct sun rays, which can burn the leaves and ultimately damage the plant.
Watering Needs
Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff requires adequate watering to thrive. Waterlogging and drying out of the soil will harm the plant. Therefore, it's essential to water the plant twice a week or when the soil inch below the surface feels dry. During the summer seasons, it's necessary to water the plant frequently to prevent it from drying out.
Fertilization
Fertilization of the Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff plant is necessary for the health of the plant. The best time to fertilize the plant is in the spring season, as this is when the plant starts growing actively. Organic fertilizers, such as seaweed extracts or compost, are the best for the plant, and it's necessary to follow the manufacturer's instructions when applying them.
Pruning
Pruning the Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff plant is necessary to maintain its shape and promote healthy growth. The best time to prune the plant is during the fall season when it attains maturity. It's crucial to remove the diseased, damaged, or dead leaves to prevent the spread of diseases to the healthy sections. To support the plant's healthy growth, it's essential to remove the branches that are crossing or rubbing against each other.
Propagation of Tetraplasandra kavaiensis var. intercedens
Tetraplasandra kavaiensis var. intercedens can be propagated by both sexual and asexual methods.
Sexual Propagation
Seeds can be collected from the plant when the fruit ripens and is ready to fall off. The seeds should be cleaned and soaked in water for at least 24 hours to remove any germination inhibitors. Then, they can be planted in a well-draining potting mix and kept in a warm, humid location. Germination should occur within a few weeks, and the seedlings can be transplanted once they have grown to a sufficient size.
Asexual Propagation
Tetraplasandra kavaiensis var. intercedens can also be propagated by stem cuttings. Select a stem that is healthy and has a few leaves, and cut it just below a node. Remove the leaves from the bottom half of the stem, and dip the cut end in rooting hormone before planting it in a well-draining potting mix. Water the cutting and keep it in a warm, humid location until it starts to produce new growth.
Disease Management for Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff
Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff is a relatively hardy plant, but like all plants, it can be affected by diseases. One of the most common diseases that can affect Tetraplasandra is leaf spot. Leaf spot is caused by a fungus that manifests as circular spots on the leaves. To manage leaf spot, it is important to remove all affected leaves and dispose of them properly. Be sure to sanitize gardening tools and keep the area around the plant clean.
Another disease that can affect Tetraplasandra is root rot. Root rot is caused by overwatering, poor drainage, or fungal infections. The best way to manage root rot is to avoid overwatering and ensure that the plant has proper drainage. If the plant has been infected, it may be necessary to apply a fungicide to the soil.
Pest Management for Tetraplasandra kavaiensis (Mann) Sherff var. intercedens Sherff
Tetraplasandra kavaiensis is susceptible to damage from several pests, including scale insects and mealybugs. Both of these pests can cause significant damage to the plant, including stunted growth and leaf drop. To manage scale insects and mealybugs, it is important to inspect the plant regularly and remove any visible pests with a cotton swab dipped in rubbing alcohol.
Caterpillars can also be a problem for Tetraplasandra kavaiensis. They can cause significant damage to the leaves and may require the use of a pesticide to manage. However, it is important to use pesticides carefully and only as a last resort. Always follow the instructions carefully and avoid using pesticides near other plants, pets, or people.
To avoid pest problems, ensure that the plant is healthy and well-cared for. Use high-quality soil, provide adequate water and nutrients, and maintain good airflow around the plant.
