I think it's probably Greek Oregano (Origanum heracleoticum) which has coarse, ovate, fuzzy leaves and grows up to 40cm high in bloom. It has a strong, earthy fragrance and is the most flavourful of the oreganos. Also called Wild Marjoram, Winter Sweet, Origany and Origan.

You should find the following information helpful.

Most Origanum species are treated much the same as each other. They are tender perennials, sometimes treated as annuals in colder areas.

Marjoram/Oregano likes the full sun. Sow seeds in spring, or divide established plants in late summer. Seeds may be slow to germinate  ideal temperature is 20C. It may also be increased by cuttings, which are made from small side shoots in the spring or summer. The lower leaves are removed and a clean cut is made just below the bottom joint. Grow in light, fairly rich, well-drained soil with pH 7.0-8.0. After flowering trim the plant to prevent it from becoming straggly. Before the plant dies in the winter, cut back the year's growth to within 7-8cm of the ground. During the winter they need to be mulched heavily in very cold regions. Marjoram may be grown in containers but do not allow to become too moist. Some varieties can become quite invasive. All Oreganos grow better in full sun and well-limed, fertile soil that is moist. They will tolerate poor soil and dry conditions, but will not do as well. Good companion plant for cauliflower, but do not plant near broccoli or cabbage.

Harvesting: Pick leaves whenever available to use fresh. Begin harvesting when plants are about 10-12 cm high. They can be dried or frozen, or put in oil or vinegar. Flavour is best just after the flower buds form, usually mid-summer.