Can You Grow Thyme Indoors?
You CAN grow thyme indoors.
Herbs, such as thyme, can be grown indoors but will require the same conditions that they prefer outdoors. Thyme flourishes in fertile, well-drained soil in direct sunlight so you will need to mimic those conditions indoors.
Indoor Soil Requirements
Your potting soil must be able to drain well. A soilless mixture such as perlite is a good choice. Many herbs prefer a non-acidic soil so it is often beneficial to add one teaspoon of ground limestone for a 5" pot to cut down on soil acid. Thyme is more forgiving flourishing in a wide range of soil pH between 4.5-8.
How to Water Indoor Thyme
Thyme likes dry soil so don't allow your pots to sit in a saucer of water. Water thoroughly, then allow the soil to dry out somewhat prior to watering again. The plant needs to be watered prior to looking wilted.
Indoor Thyme Light Requirements
Indoor thyme requires a minimum of ten hours of light per day. It will thrive in a warm, sunny windowsill, but may need supplemental light during the shorter days of winter. A grow light is ideal for at least a few hours every day. Place your thyme plant 8-10" from the light for best results.