Cacti and succulents are popular houseplants because they are low-maintenance, drought-tolerant, and beautiful.
However, many beginners struggle to keep them alive because they make common mistakes when it comes to watering, lighting, and potting.
If your succulents are dying, turning mushy, or not growing well, you might be making one (or more) of these mistakes!
In this detailed guide, we’ll cover:
- The 10 most common mistakes beginners make
- How to fix and avoid these problems
- Pro tips for growing healthy, thriving succulents and cacti
Let’s dive in and help your plants thrive instead of die!
1. Overwatering – The #1 Killer of Succulents & Cacti
Mistake: Giving your cactus or succulent too much water is the most common reason they die. These plants are adapted to store water in their leaves and stems, so they don’t need frequent watering.
How to Fix It:
- Water only when the soil is completely dry (usually every 2-4 weeks, depending on climate and season).
- Use the “soak and dry” method – thoroughly water the soil, then let it dry out completely before the next watering.
- Check for signs of overwatering: yellow, mushy, or translucent leaves. If this happens, stop watering and let the soil dry out.
2. Using the Wrong Soil
Mistake: Regular potting soil retains too much moisture, which can cause root rot in cacti and succulents.
How to Fix It:
- Use a well-draining cactus or succulent mix that contains sand, perlite, and pumice.
- If you only have regular potting soil, improve drainage by mixing in 50% perlite or sand.
- Avoid moisture-retaining soil mixes – these can kill your plant.
3. Choosing a Pot Without Drainage Holes
Mistake: Planting succulents in pots without drainage holes leads to excess water buildup, which causes root rot.
How to Fix It:
- Always use a pot with drainage holes to allow excess water to escape.
- If using a decorative pot without holes, place the plant in a plastic nursery pot inside the decorative container and remove it when watering.
- Choose terracotta or clay pots – they absorb moisture and help prevent overwatering.
4. Not Giving Enough Light
Mistake: Succulents and cacti need bright light, but beginners often place them in low-light conditions. Without enough light, they become stretched, weak, and pale (called etiolation).
How to Fix It:
- Place your cactus or succulent in bright, indirect sunlight (at least 6 hours per day).
- If growing indoors, place near a south-facing window for the best light.
- If you don’t have enough natural light, use a grow light to supplement.
5. Exposing to Too Much Direct Sunlight Too Quickly
Mistake: Moving a succulent or cactus from shade to direct sun can cause sunburn, leading to brown or white scorched patches on leaves.
How to Fix It:
- Gradually acclimate plants to full sun by increasing sun exposure by 1 hour per day over a week or two.
- If growing outdoors, keep in partial shade first, then move into direct sunlight.
- If sunburn occurs, move the plant to a shaded area and trim off damaged leaves.
6. Not Understanding Seasonal Dormancy
Mistake: Watering succulents and cacti the same way year-round without considering dormancy periods can lead to overwatering and rot.
How to Fix It:
- Summer-growing succulents (like Echeveria, Aloe, and Agave) need more water in warm months and less in winter.
- Winter-growing succulents (like Haworthia and Aeonium) grow in cooler months and rest in summer, so they need less water in summer.
- Learn your plant’s growth cycle and adjust watering accordingly.
7. Planting Different Succulents Together Without Considering Their Needs
Mistake: Mixing succulents with different care requirements in the same pot can cause some to thrive while others struggle.
How to Fix It:
- Group succulents with similar light, water, and soil needs together.
- Avoid planting fast-growing succulents (like Jade Plants) with slow-growing ones (like Lithops), as they compete for resources.
- Use individual pots if you have different species with unique needs.
8. Ignoring Pests (Mealybugs, Spider Mites, Fungus Gnats)
Mistake: Many beginners don’t check their succulents for pests, which can quickly spread and kill plants.
How to Fix It:
- Check regularly for mealybugs (white cottony bugs), spider mites (tiny webs), and fungus gnats (small flying insects).
- If pests appear, treat with neem oil, rubbing alcohol, or insecticidal soap.
- Quarantine new plants for 1-2 weeks before placing them with others to prevent infestations.
9. Repotting Too Often (Or Not Enough!)
Mistake: Repotting too frequently disturbs the roots, while not repotting at all can lead to root-bound plants.
How to Fix It:
- Repot every 2-3 years or when you notice slow growth, overcrowded roots, or compacted soil.
- Use a slightly larger pot each time—not too big! (Extra soil retains more moisture, which can lead to rot.)
- Spring or early summer is the best time to repot succulents and cacti.
10. Fertilizing Too Much (Or Not At All!)
Mistake: Succulents don’t need as much fertilizer as other plants. Over-fertilizing can cause weak, leggy growth.
How to Fix It:
- Use a cactus or succulent fertilizer (low in nitrogen) once every 2 months during the growing season.
- Dilute the fertilizer to half strength to avoid overfeeding.
- Avoid fertilizing during dormant months (winter for most succulents).
By avoiding these 10 common mistakes, you can grow strong, healthy succulents and cacti that thrive for years!
