How To Look After Oregano Plant. After you wash pat off excess moisture and allow the oregano to sit on a porous cloth or paper towel to dry for at least 5 minutes. The soil should be around 70ºF.
After about three weeks your oregano seeds should have germinated and grown enough to be ready for pot or outdoor transplantation. Keep the seedlings in a lighted room but not exposed to direct sunlight at a temperature between 19 and 22 ºC and water enough to keep the substrate moist but never waterlogged. Oregano can easily be started from seeds though you can also use cuttings from an established plant.
After about three weeks your oregano seeds should have germinated and grown enough to be ready for pot or outdoor transplantation.
Cut plants back completely in midsummer to encourage fresh new leaves. Generally it is recommended to collect stems or leaves early in the morning. However if you live in a hot frost-free climate plant it in fall or winter. Start by washing it in water.