This is news to me!

4. Soil Mix for Optimal Growth
A well-draining soil mix is crucial for rosemary. You can create an ideal mix by combining equal parts of potting soil, coarse sand, and perlite. This mixture ensures good drainage while retaining enough moisture for the plant's roots.
Adding a slow-release fertilizer to the soil mix can provide additional nutrients to support the plant's growth. However, be cautious not to over-fertilize, as this can lead to excessive foliage growth at the expense of essential oils.
5. The Importance of Drainage
Proper drainage is vital for rosemary's health. Without it, the roots can become waterlogged, leading to root rot and other issues. Ensure that the pot has adequate drainage holes and consider placing a layer of gravel or small stones at the bottom before adding soil.
This layer will help facilitate water movement and prevent the soil from becoming compacted, allowing the roots to breathe and grow freely.
6. Watering Techniques for Rosemary
Watering rosemary requires a balanced approach. While the plant is drought-tolerant, it still needs regular watering, especially during hot, dry spells. Water the plant thoroughly, allowing the excess to drain out of the pot.
Allow the top inch of soil to dry out between waterings. This prevents overwatering, which can lead to root rot. During the winter months, reduce watering frequency as the plant's growth slows down.