The oregano plant is a perennial herb that grows 24 inches tall with a 20-inch stem spread. Oregano grows vigorously and spreads through underground root runners. Plant oregano indoors during late winter, or directly outdoors once the soil begins to warm. Harvest oregano leaves once the plant reaches a height of 6 inches, and use it fresh for cooking, or dry it for use in recipes when fresh herbs are not available.
Sow Seeds Indoors
Sow oregano seeds indoors six to eight weeks prior to the desired outdoor planting date. Fill a seed starting tray with a water-moistened seed-starting soil.
Sprinkle oregano seeds over the soil and lightly sprinkle moistened seed starting soil over the seeds without fully covering them.
Set the seed tray in a warm location that has indirect sunlight and a temperature of 70 degrees F. Monitor the soil moisture to keep it evenly moist during the germination process. Seeds will sprout in approximately two weeks.
Transplant the oregano seedlings outdoors, or into 6-inch growing containers, filling with potting soil once they reach a height of 4 inches. Transplant the container growing oregano seedlings into a 12-inch growing container once the plant becomes root-bound in the smaller container.
Sow Seeds Outdoors
Prepare a garden area for the oregano once there is no longer a risk of frost and the soil temperature is above 60 degrees F. Oregano requires location in full sunlight with a nutrient-rich, well-draining soil for proper growth.
Test the soil pH as oregano grows best in a pH of 6.0 to 8.0. Work ground rock sulfur into the soil to raise the pH and limestone to raise the pH. Water the soil well to increase amendment absorption, and let it rest two weeks.
Loosen the soil with a shovel and remove all weeds and debris from the area. Create rows that 1/4 inch deep and 18 inches apart. Sow seeds 6 inches apart along the rows.
Sprinkle soil over the seeds but do not fully cover them, as oregano needs sunlight to germinate. Sprinkle the soil lightly with water to moisten it without creating a pooling of water. Monitor the soil moisture to make sure it remains evenly moist during the two-week germination process.
Thin oregano plants so they are 10 to 12 inches apart once the seedlings reach 1 to 2 inches in height. Provide supplemental water to the oregano plants when the weekly rainfall is less than 1 inch.
About this Author
Jennifer Loucks has over 10 years of experience as a former technical writer for a software development company in Wisconsin. Her writing experience includes creating software documentation and help documents for clients and staff along with training curriculum. Loucks holds a Bachelor of Science major from the University of Wisconsin - River Falls specializing in animal science and business.