By our calculations, you should look at sowing Matador about 60 days before your last frost date.
A variant of Giant Nobel, called the Matador strain. 3
A Spanish heat-tolerant and mildew-resistant spinach was interbred with Giant Nobel, to produce this OP variety.
Matador is Mildew resistant, and will also germinate at slightly higher temps than most other Spinach varieties.
Matodor
Giant Nobel Improved, Matador Strain