Water your herb plants based on the kind of herbs you are growing. Some need more frequent watering as they enjoy moist soil, while others prefer dry soil between watering. Climate conditions will also impact an herb's need for water; if your plants are growing outside in a humid environment, you may not need to water them as much. If you grow your herbs indoors in containers, they may enjoy a mist of water in addition to their normal watering routine.
Water your young rosemary plants every other day until they become established. Mature rosemary plants do not need as much water, let the soil become dry before you add more water. As with most herbs, proper drainage is essential to growing healthy plants. Rosemary does not enjoy sitting in soaked soil as the roots are prone to rot under these conditions.
Water young basil plants daily as long as you plant them in soil or a container that has good drainage. Like most other herbs, basil does not like wet feet. Mature basil plants need at least 1 inch of water each week, but you should water them daily during drought conditions. Basil enjoys full sun, so this herb will need more water than your rosemary plants.
Allow your thyme plants to dry out between waterings as this herb is very susceptible to root rot. Plant your thyme in well drained soil, either indoors in a container or outside in your garden. Thyme grows best in a location where it receives strong sunlight for at least 5 hours each day. If you're growing thyme under fluorescent grow lights, place the lights 6-inches above the plant for best results.
Water lavender plants when the soil is dry, as these herbs prefer to dry out a bit between waterings. French lavender is your best option from this species for indoor container gardening, just make sure to give the plant at least five hours of strong sunlight daily. You can also mix sand and lime in the soil around all of your lavender plants, indoors or out for optimum growing conditions.
Water your oregano on a regular schedule, but allow the soil to become dry between waterings. Oregano grows well in containers or in your garden, and is semi-tolerant of drought. This herb prefers a sandy, well drained soil with a preferred pH range of 6.0 to 8.0.