There are 6 keys elements to growing herbs indoors- light, housing, temperature, watering, potting mix/soil, and pest/health monitoring.

Light

Always put indoors herbs by a window, where they will have the best access to direct light. In order for herbs to produce the fullest leaves and most potent flavors, they will need atleast 4 hours of direct sunlight. Many of us living in the city are familiar with windows that have some light exposure but face a brick wall. This won’t be the ideal spot for your herbs. Supplement with HID grow lights if your home doesn’t get enough natural light.

Housing (Planters/Drainage)

Make sure to plant your herbs in a container with drainage holes, and as a general rule of thumb, select a pot that is minimum 8” diameter. Large containers hold more soil. The larger the soil volume, the stronger and more resilient your plants will be, and the less frequently you’ll have to water them. It’s better to combine two or more plants in a large pot than to use several little pots.

Temperature

Herbs prefer a consistent temperature in the range of 65F to 75F. Therefore, avoid placing herbs near an air conditioner or heater. In winter months, be wary of placing your herbs by a window that you may want to open frequently and/or for long periods of time.

Watering/Daily Maintenance

Indoor herb gardens need to be watered regularly but be careful of over-watering. Check your indoor herb garden daily by sticking your finger into the soil. As a general rule of thumb, if it feels dry half an inch beneath the surface, it’s time to water.

Herbs are all about leaves. It’s the leaves we eat in most cases, not the flowers. If the herb is flowering, pinch off the flowers as this will give the leaves the most potent flavors.

Potting Mix/Soil

A good potting mix is one that is fluffy, holds moisture, and gives plant roots the perfect balance of air, moisture, nutrition, and anchorage. Try a quality mix from Miracle Gro or BlackGold.

Pest Control

While indoor herbs are generally less susceptible to common pests than outdoor gardens, they can occur. If pests are detected, try this homemade recipe.

1/2 teaspoon dish washing liquid
1/4 teaspoon cooking oil
1-quart warm water

Mix all ingredients in a small spray bottle. Mist upper and under sides of leaves every 10 days to control mealy bug, spider mite, aphid, thrips, or any other sucking or chewing insect.