Seeds can float on water for extended periods and may remain viable for 8 years or more under field conditions. Most seeds are dormant at maturity. A cool, moist period breaks dormancy, and germination of these seeds does not require light. However, evidence suggests that light stimulates germination of seeds that have not had a cool, moist period. Under experimental conditions, root fragments from 3-week old seedlings developed new shoots.
Occasional cultivation can disperse root fragments.
Mowing or burning before flowers mature can prevent seed production, but does not prevent spread by creeping roots or affect buried seed. These species are easy to distinguish from Dalmation and yellow toadflax as they all typically have red to purple flowers . Morocco toadflax is often a component of commercial wildflower seed. All are native to the Mediterranean. Refer to the table below for distinguishing characteristics.