How long to grow to 2' - 2 1/2'?
Oregano is a woody perennial that is most often grown from cuttings rather than seed.
There are different varieties of oregano and height can vary. Some are prostrate, or tend towards ground-hugging and will be slower to get taller until their stems are more woody.
If you are growing from seed and harvest leaves in the first year, that will also affect the overall height.
Here is our page on Oregano:
I have 2 types of oregano in my garden, Greek oregano and spicy oregano. Do you know how tall each type should be when they are fully grown? D o you know how long it should take for each type to grow to the full height? Thank you for your help.
Origanum vulgare var. hirtum, Greek oregano height varies from 6 inches to 2 feet. Height depends on if you harvest the leaves, growing conditions, etc. Oregano is a perennial. If the winter is not harsh and it survives the winter and growing conditions are favorable during the growing season, it may grow to about 2 feet in the second year.
There are several types of oregano that are spicey such as Origanum syriacum, syrian oregano and Origanum tyttanticum, turkestan oregano. Take a look at the attached links for more information regarding growth, height, etc. and the type you are referring to. These types may not be winter hardy here and will have to be treated as an annual.