What Is the Ideal Temperature Range for sweet alyssum?
Though sweet alyssum is native to Mediterranean region and Macaronesia, nowadays it is introduced as garden plant and naturalised in temperate regions of the world because of its hardiness. Its optimum growing temperature is between 10 to 26 ℃ but it can grow normally at temperatures up to 34 ℃. Low temperatures can kill it and it can survive only with light frosts. It has normal water requirements, prefers medium to dry conditions and requires moist soils but not soggy, so avoid overwatering it.