it’s still a little early to start germinating for the 2019 (outdoor) vegetable growing season, but early bird gets the longer growing season.
so in case you gathered some seeds from organic veggies all winter, you may already have some variety to start with, and don’t need to spend too much on fancy “heirloorm” low-output high-cost seeds:
pumpkin, squash, cucumber, (non-hybrid) tomato & bell peppers, chili, physalis, … i might try the Kiwano just for fun; water melon might work…
for egg-plants (aubergines, melanzani) get some non-hybrid seed from a friend, or a shop – soon.
from now on, you should also keep your sprouting potatoes.
Horse radish (Kren) and red radish (Radieschen) can be re-planted; the former will grow roots down, the latter will grow leaves up, and produce (flowers and) seeds soon.
For Garlic it’s little late; if you expect a long growing season, why not give it a try.
(pic)