Cussonia spicata

Cabbage trees require full sun, which means they need above 6 hours of sunlight daily, though they can also adapt to partial sun, receiving about 3-6 hours of sunlight. It's important to watch how sunlight moves through your garden to ensure your plants receive the ideal balance of light and shade for optimal growth. Cabbage trees originate from open woodlands, benefiting from plenty of light, but excessive exposure can lead to leaf scorching, while insufficient light impedes growth.

Indoor Cabbage trees require adequate lighting for optimal growth, especially when natural sunlight is insufficient. Artificial lights, such as LED, are beneficial because they can provide specific wavelengths needed for growth. The required intensity varies: full sun plants need 30-50W/sq ft, partial sun plants 20-30W/sq ft, and full shade plants 10-20W/sq ft of light. The light source should be 12-36 inches above the plant and left on for 8-12 hours per day to mimic natural sunlight conditions.

Symptoms of light deficiency in Cabbage trees include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, and leaves turning paler or displaying chlorosis. Excessive sunlight can cause symptoms like sunscald, leaf curling, wilting, and leaf scorching. These symptoms highlight the plant's struggle with adapting to its light conditions, either in seeking more light or being damaged by too much direct exposure.

To optimize light exposure for Cabbage trees, gradually move them to locations that receive at least 6 hours of direct sunlight daily. For indoor plants, use a south-facing window or artificial light, such as desk or ceiling lamps or professional grow lights, for at least 8 hours a day. Outdoor plants should be moved gradually to prevent sunburn. If necessary, reduce obstructions by pruning or transplant smaller plants to sunnier spots with good drainage. Note that parts of the plant already affected might not recover, but new growth should be healthy with improved light conditions.

Cabbage trees (Cussonia spicata) thrive in their native growth environment with temperatures ranging between 59 to 100°F (15 to 38°C), preferring moderate to high temperatures. They have some tolerance to cold and usually don't need extra protection if temperatures stay above -5°C. However, in colder conditions below -5°C, temporary protective measures like wrapping the plant in plastic film, fabric, or similar materials are recommended, and these should be removed once temperatures rise.

The Cabbage tree has a moderate tolerance to low temperatures and performs best when the temperature remains above 15°C. During winter, it's crucial to keep it above -5°C to prevent damage. If temperatures fall below -10°C, the tree's leaves may droop, and in severe cases, they might wilt and fall off. To protect the tree during cold spells, trim any frost-damaged parts and wrap the plant with materials like non-woven fabric or cloth, additionally creating a wind barrier.

In the summer, it's important to ensure that the Cabbage tree does not endure temperatures above 38°C. Exposure to temperatures exceeding 43°C can lead to lighter leaf color, dry and withered leaf tips, leaf curling, and an increased risk of sunburn. To mitigate these effects, trim away the sunburned and dried-up parts of the plant. Moreover, relocating the plant to a shaded area during midday and afternoon hours, or using a shade cloth, can help, along with watering the plant in the morning and evening to maintain soil moisture.