Tip - making plans for starting tomatoes..cold frame/or indoors?

My last frost date is in May. The last few yrs I have started my plants in my kitchen window. I want to put out more this yr tho. I have read about using cold frames to grow cool season veggies early, and this morning for starting things early. I understand the plants will still need to be germinate...
Tags: house,architecture,design,interior design,interior designer,architect,kitchen,bath,modern,traditional,contemporary,contractor,builder