How to Prune a Cactus
As a unique existence among desert plants, cacti are deeply loved for their unique shapes and tenacious vitality. However, pruning and maintenance are crucial to maintain a perfect plant shape. This article systematically analyzes the complete process and shaping techniques of cactus pruning through a combination of text and images, helping you create a personalized desert landscape.
Three Core Techniques of Cactus Pruning
1. Top Control and Plant Shape Optimization
It is recommended to maintain an optimal viewing height of 50-80cm during home care. When the new pads at the top exceed 3cm, use a disinfected blade to cut them off flat. This is especially suitable for columnar varieties (such as Euphorbia and Rhipsalis), which can effectively promote the germination of lateral buds to form a multi-layered landscape.
2. Nutrient Regulation Pruning Method
Firstly, prune the weakened pads with a diameter less than 1/3 of the main stem, and keep the growth points intact. For spherical varieties (such as Astrophytum), special attention should be paid: retain 2-3 healthy daughter pads at each growth point, and remove the excess buds from the base with forceps. After pruning, it is recommended to supplement phosphorus and potassium fertilizers to promote wound healing.
3. Secret of Flower Management
After the flowers wither, cut obliquely at 1cm from the flower stalk, and spray 0.1% phosphorus acid potassium solution. Most varieties (such as Echinopsis) can achieve secondary flowering. Note: For varieties that bloom at night (such as Cereus), pruning should be completed in the early morning.
Four Advanced Shaping Principles
1. Geometric Shape Design
Layered shapes retain 3-5 staggered pads, and spiral shapes require retaining a growth point every 120 degrees. Rotate the pot by 15 degrees monthly to ensure even light exposure.
2. Selection of Professional Tools
It is recommended to use carbon steel pruning shears (blade length 15cm). When dealing with pads with a diameter >2cm, first heat the blade to 60℃ with an alcohol lamp before cutting, which can effectively reduce juice loss.
3. Wound Treatment Norms
Immediately apply charcoal powder or sulfur powder after cutting, and place it in a well-ventilated area for 3-5 days. During the rainy season, seal the cut with wax after pruning to prevent fungal infections.
4. Seasonal Pruning Points
By systematically mastering the timing and methods of pruning, not only can the ornamental value of cacti be enhanced, but their lifespan can also be extended. It is recommended to make local adjustments every quarter, combined with the characteristics of different varieties to create a personalized desert garden. Remember that every pruning is a deep conversation with the plant, and only by observing the growth response patiently can the best shaping results be achieved.