Even the most modest cacti can become a challenge to care for. The following four mistakes are particularly common—but they are also easy to avoid.
With over 5,000 species worldwide, cacti are generally sun-loving plants that are not ideal for garden beds. Instead, they thrive in pots inside the home. Although cacti are considered particularly unpretentious houseplants, there are a few common errors in their care.
Mistake 1: Overwatering Cacti
Cacti originate from warm and dry regions, so the cardinal rule is: Do not overwater! It’s better to skip a watering session than to risk drowning the plant. Cactus roots can only absorb large quantities of water slowly, and excess water can lead to water stagnation and root rot.
Instead of watering weekly, it’s sufficient to water cacti once every four to six weeks. During winter, many cacti need a rest period with reduced watering. To align with their natural cycle, start reducing water from September. From November to February, cacti should not be watered at all.
Mistake 2: Too Little Light
If you notice brown spots on your cactus, it’s a sign that it’s not in the right place. Cacti require a lot of light. Those with many thorns or hairs may need full sun, while leafy cacti prefer light without direct sunlight. In winter, natural sunlight is less abundant.
As days lengthen, gradually acclimate your cacti to increased light levels. Too much sun too soon after winter can cause sunburn (brown spots).
Mistake 3: Nutrient-Rich Soil
Cacti need few nutrients. Excess nutrients can disrupt the nutrient balance, leading to issues such as excessive growth or soft tissue. Avoid using nutrient-rich substrates, as heavy soil is also detrimental. Potting soil is generally unsuitable for cacti.
Mistake 4: Too Much Fertilizer
Regarding nutrients, fertilizer is key. However, for cacti, the rule is: less is more. Fertilize your cacti once a month during the growing season, from April to July. Use a special cactus fertilizer, which is tailored to their needs, with a particularly low nitrogen content.
By avoiding these common mistakes, you can ensure your cactus thrives and remains a resilient part of your indoor garden.
