Candelabra Cactus, also known as Euphorbia lactea, is a hardy plant that can tolerate low temperatures of 26°F (-3°C). However, it is important to note that while it can withstand brief periods of freezing temperatures, it should be protected if extended freezes are expected.
In my personal experience, I have seen candelabra cacti survive light frosts without any significant damage. However, during severe freezes or prolonged periods of cold weather, I have noticed that the cactus can suffer from frost damage or even die if not adequately protected. Therefore, it is crucial to monitor the weather forecast and take necessary precautions when temperatures drop below freezing.
When it comes to sunlight, candelabra cacti are quite adaptable and can tolerate a wide range of light conditions. They can thrive in full sun, where they receive direct sunlight for most of the day. However, they can also tolerate light shade, although excessive shade may reduce flowering and result in a more open branching habit.
In terms of watering, candelabra cacti are low water users. They have adapted to survive in arid environments and can tolerate periods of drought. It is important to allow the soil to dry out between waterings to prevent overwatering, which can lead to root rot. I have found that watering once every two to three weeks during the growing season (spring and summer) is usually sufficient. During the dormant period (fall and winter), watering can be reduced even further.
Feeding candelabra cacti is not a demanding task. They do not require frequent fertilization, and overfeeding can actually be detrimental to their health. I recommend using a balanced cactus fertilizer diluted to half strength and applying it once every two to three months during the growing season. This will provide the necessary nutrients without overwhelming the plant.
To summarize, candelabra cacti can tolerate temperatures as low as 26°F (-3°C), but extended freezes should be avoided by providing protection. They can thrive in full sun to light shade, although too much shade may affect flowering and branching. Watering should be done sparingly, allowing the soil to dry out between waterings. Feeding should be done with caution, using a diluted cactus fertilizer applied every few months. Remember, observing and understanding the specific needs of your candelabra cactus will help ensure its health and longevity.