Vegetables, legumes, and fruit that grows from the ground or on a plant that is not a tree get Borei Pri Ha'adamah.
After eating: Borei Nefashot, after eating a kezayit or drinking a revi'it.
Bracha on sunflower seeds
BeforeHa'adamah
AfterBorei Nefashot
בָּרוּךְ אַתָּה ה׳ אֱלֹקֵינוּ מֶלֶךְ הָעוֹלָם, בּוֹרֵא פְּרִי הָאֲדָמָה
Baruch atah Hashem, Elokeinu melech ha'olam, borei pri ha'adamah.
Blessed are You, Hashem our God, King of the universe, who creates the fruit of the ground.
This follows the common ruling of most poskim. For different customs or a specific question, ask a rabbi.