How to hydroponically cultivate a cactus
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We know that cacti are favored for their unique drought resistance and beautiful appearance, but due to traditional cultivation methods, cacti can be dirty and difficult to manage. Many people fail to properly manage fertilization and watering, resulting in the death of their beloved plants. Now, the cultivation of cacti has entered a new stage: hydroponics. For mature cacti that have reached an ornamental effect, clear water can be used for mutation, as the goal of cultivation is to maintain the original shape. While sand and perlite can only be used as a medium to stabilize the plant in the planting cup or to maintain the rootstock, the mutation of water roots and aeration tissue must be carried out in a water environment.
Choosing a Cactus
First, we need to choose a robust cactus, with a focus on selecting plants where the lower part of the cactus body and the rootstock are prominent. Cacti cultivated using the Sanling sword grafting method are more suitable for hydroponics.
Processing the Cactus
Completely cut off the dead roots at the base of the cactus, ensuring a flat cut. Then wash the soil attached to the rootstock clean with clear water and let it dry for 3 days in a dry place to allow the cut to fully dry. Removing the soil-bound roots from the cactus is necessary. Since cacti are succulents, allowing them to dry for a period before induction is more beneficial for root promotion, as succulents are very sensitive to moisture in the seedbed; too much can cause rot, and too little can affect root promotion. A nutrient solution without ammonia is most suitable for co-cultivation with fish, otherwise, it can lead to fish death. The water level should not exceed 1/3 of the bottle.
Key Points for Maintenance
Place the planted cactus in a well-lit environment with strong scattered light, maintaining a temperature of over 20 degrees. Generally, water roots will emerge in 3-7 days. Replace the nutrient solution immediately after water roots appear. Note: Absolutely no watering the cactus during the mutation process, as it can easily lead to rot and necrosis of the cactus body.
Daily Care
Hydroponically cultivated cacti have a spherical or oval-shaped green stem, with several longitudinal ridges, densely covered with yellow-green spines of varying lengths, arranged radially. The cactus body often produces many small balls on the side, with graceful and elegant shapes.
Hydroponically cultivated cacti are known as "lazy person's flowers" due to their convenience and ease of care. Only a few points need to be noted:
One, suitable ambient temperature:
The growth temperature of hydroponic plants is between 5℃ and 30℃, within which they can grow normally.
Two, suitable lighting:
Hydroponic plants require scattered light, not necessarily direct sunlight. In summer, direct sunlight should be avoided as much as possible.
Three, changing water and cleaning the plant roots:
Hydroponic plants should be changed every 7 days in summer and every 10-15 days in winter, adding a few drops of hydroponic flower-specific nutrient solution (the concentration of the nutrient solution should be prepared according to the instructions). The containers used for cultivating hydroponic plants are prone to moss growth, which affects the appearance of the roots and consumes oxygen in the water. When changing water, first wash the sticky liquid off the plant roots with clear water, cut off old and rotten roots, and clean the moss off the container and roots. Each time the water is changed, the water level should cover 1/2 to 2/3 of the roots, with the rest of the roots exposed to the air.
Four, moisturizing and foliar fertilizer application:
To prevent leaf drying, water should be sprayed on the leaves during daily care to keep them moist. It is best to spray foliar fertilizer once a week, which can provide nutrition for the leaves, increase leaf luster, and resist low temperatures in winter.
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