Hyssop blooms in late summer through early autumn with flower spikes of deep blue, red, pink or white. It is a member of the mint family and has a very aromatic somewhat medicinal smell. When the leaves are crushed they have a mint like odor. Sow seeds indoors or directly in the garden in early spring. Hyssop prefers full sun to partial shade with a well drained, even dry, soil. You can amend soil with organic matter. Germination generally takes between 14 and 21 days, but can take as long as a month. You can also sow the seeds outdoors in late fall for spring germination.
Pollination occurs by insect, bird, wind, humans, or other natural mechanisms. Because there are no restrictions on the flow of pollen between individuals, open-pollinated plants are more genetically diverse. However, as long as pollen is not shared between different varieties within the same species, then the seed produced will remain true-to-type year after year.
Perennial plants live for more than two years. They return year after year and continue growing until they reach maturity, which varies by plant but averages three to five years.
* This is an estimated guide. Conditions may vary considerably due to location.