somewhat late...what can i expect

ok so i started 7 seeds indoors under a compact floro last week 5 germinated and are about 2 inches with 4 leaves, i plan on moving them outdoors in 2 or 3 weeks (around the 1st of july) . up here in Canada last frost was 2 months ago and first frost is about mid October.

1) i will only be able to visit them every 3 weeks. should this be a problem with watering, is there any simple watering contraption i can use?.

2) and what kind of yield can i expect?.

3) until there outside how much light should i give them?. right now its 20/4

any help would be great thanks.