When to Start Germinating Verbena 'Tuscany'

When to Sow

• “Tuscany” verbenas are hardy in U.S. Department of Agriculture plant hardiness zone 11 but they are grown as annuals in full-sun gardens everywhere. They should be planted in the landscape shortly after the last spring frost. Determine when to start the “Tuscany” seeds by first determining when the last spring frost usually occurs in the area. Start the seeds eight to 10 weeks before the last expected spring frost.

Germination Medium

• “Tuscany” verbena seeds should be placed in the refrigerator in a sealed container for one week. Prepare a seed flat before removing the seeds from the refrigerator. Pour medium-texture vermiculite into the flat and moisten it thoroughly. Sow the seeds and gently cover them with a thin layer of moist vermiculite.

Moisture

• For best results, do not water “Tuscany” verbena seeds. The water will plug small holes in the seed shells that must remain open for them to germinate. Cover the seed flat with a clear piece of plastic to hold the moisture in. If the vermiculite starts to dry, use a spray bottle set at a fine mist setting to lightly moisten the top.

Light and Temperature

• The seeds do not require light to germinate but the sprouting seedlings will grow sturdier if they have moderate light exposure. Set them in a bright room but do not expose them to direct sunlight. Maintain the vermiculite at a temperature of 76 degrees Fahrenheit. The “Tuscany” verbena usually germinate in one week but may take up to three weeks.