We are now entering 100% dormancy mode, with no watering, just “observing.” I’ve written a brief guide for beginner enthusiasts about lithops, but overall, this guide applies to all cacti and succulents.

1. Creating Conditions for Overwintering

   • Temperature: Lithops prefer cool conditions during the winter but do not tolerate cold. The optimal temperature for overwintering is between +10°C and +15°C. Protect the plants from sudden temperature changes and cold drafts.
   • Lighting: Lithops require bright light even in winter. Place them on a south-facing window or use grow lights (10-12 hours of light per day). Ensure the plants get enough light to avoid etiolation.

2. Watering During the Winter Period

   • Limited Watering: Lithops are in a dormant state during winter and do not need watering. Completely stop watering from the end of autumn to the beginning of spring (usually from November to March). Lithops use the moisture stored in their leaves, so watering during winter can lead to rot.
   • Exceptions: If the air in the room is too dry (below 30% humidity) and the plant begins to lose its shape, you may lightly moisten the air around it, but do not water the soil.

3. Fertilizing

   • Lithops do not need fertilizers during winter.
   • Resume fertilizing only in the spring, using cactus and succulent fertilizers with low nitrogen content.

4. Ventilation

   • Ensure good air ventilation in the room to prevent moisture retention, which can lead to fungal diseases.
   • Avoid high humidity and stagnant air, especially near the plants.

5. Repotting

   • Repotting lithops during winter is not recommended.
   • Only repot plants during the active growth period, which begins in spring.

6. Possible Winter Problems and Their Solutions

   • Softness or Wrinkling of Leaves: This is normal during winter as lithops use the moisture they have stored. Do not water them in response to this!
   • Rot: If a lithop becomes soft or shows signs of rot, the likely cause is overwatering. Ensure the soil is completely dry, and repot the plant if necessary.
   • Elongation: If lithops elongate, it’s a sign of insufficient lighting. Increase the amount of light using artificial lighting.

7. Transitioning to Spring

   • At the beginning of spring, lithops begin to come out of dormancy. At this stage: Gradually resume watering, starting with small amounts of water. Ensure that new leaves have completely replaced the old ones before starting regular watering.

Tips for Successful Overwintering

• Use well-draining soil and pots with drainage holes.
• Keep plants away from heat sources (radiators and heaters).
• Regularly check the condition of the plants, but do not take action if they appear healthy.
• If you follow these recommendations, your lithops will successfully survive the winter and delight you with their unusual appearance! 🌱