This particular variety is hands down the easiest to grow, featuring flowers with a white interior and bright yellow outline. With this variety, one won't have to wait for a particular season because these flowers bloom all the way from spring to winter frost. As suggested by the name, this flower is extremely tolerant to drought conditions, thriving in the full sun all day. At first, this plant grows into a short, only a few inches high, bush that spreads out over several feet, eventually blooming its flowers which grow only four inches in height. However, the neon-bright flowers will surely grab anyone's attention. Typically, this plant does well in zones four to eight. On top of being drought and sun resistant, it's resistant to hot weather and even high humidity.