Dwarf dahlias thrive in gardens as well as raised beds and containers, quite unlike other dahlia types. At Fruition, we sow dahlia tubers 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. All our organic dahlia tubers blossom early and abundantly in our short seasons here in Zone 5, often blossoming mid to late July through frost.