Growing Haworthia
Haworthia plants are simple to cultivate and require minimal maintenance, making them a suitable option for novice gardeners. They thrive equally on window sills, or the verandah, in miniature succulent gardens where they can coexist harmoniously with other small succulent species. These plants are perfect for outdoor rockeries in many parts of Australia. Haworthia flourish during the winter months, but can’t tolerate frost and enter a dormant phase during the hottest summer months. However, they are intolerant to both extreme heat and cold, so it’s best to avoid exposing them to such conditions and giving them shelter from afternoon summer sun and winter frost.
Soil & Fertilising
Use a well-draining potting mix. Any cactus or succulent mix works well, fertilise once a year with a slow release fertiliser at the end of winter. In the garden, a free draining soil is essential. I have sandy loam that countless cottage plants like roses etc. struggle with, but Haworthia has no problems and require no added amendments!
Light and Temperature
They prefer bright, indirect light and live happily indoors or outdoors. Too much direct sunlight can scorch their leaves when they aren’t adapted to it, and you should always protect from summer afternoon sun, I grow many in full sun except the summer afternoon sun.
They thrive in normal room temperatures, but do well outside in most of Australia. Protect them from frosts, so a sheltered spot if you live in Ballarat/Canberra or the Mountains is a must.
Water and Humidity
During the hotter months, the soil should be kept moist but not overly wet. During the winter months, water only when the soil becomes completely dry. Wet soil quickly causes root and stem rot, especially during chilly winter months. No water should ever be allowed to stand around the roots. Low ambient humidity is always preferred, which is why they make a great indoor plant. In high humidity, you need to let everything dry out, and bottom watering is best, a super porous mix is always needed.
Pest and Disease
Keep an eye out for pests like mealybugs or spider mites. Treat infestations promptly with a spray of alcohol (isopropyl/metho) I truly hate mealybugs! Root rot and leaf rot, if the rot extends into the leaves, which generally starts with outer leaves. Remove from the pot and dry it out completely as soon as you get the chance. Place it in full shade on a bench/table removing the affected leaves, allow it too dry for a couple of days, if the rot is in check place it on dry soil. High temp with high humidity have been the worst times for rot to spread to leaves for me.
