Dahlias are such joy! Fruition shares the organic tubers of dahlias that blossom early and abundantly in our short seasons here in Zone 5, often blossoming for us in mid to late July all the way to frost. At Fruition, we sow dahlias indoors in 6 weeks before final frost to transplant after final frost, though you can easily direct sow your tubers after final frost, as well.