By our calculations, you should look at sowing Nimba about 42 days before your last frost date.
By our calculations, you should look at planting out Nimba about 14 days after your last frost date.
Heirloom Polish zucchini, early bearing, easy to grow.
Polish Nimba, Polish
http://vegvariety.cce.cornell.edu/mainSearch/detail.php?variety_id=4283&filterBy=0