Spinach is a cool weather crop and bolts easily with heat or stress. Each farms availablity has alot to do with the weather and their respective planting times.
As available choose from:
 8 oz Lg leaf Still Life Farm, Hardwick MA.
1/3lb Baby Leaf Front Yard Farm Ware Ma.
Tba Overlook Farm Brookfield Ma.
Tba Petrie Family Farm, Brimfield Ma.