you can pick them when they're ready. typically they'll all be ready about the same time though. In the past my first years have put out 2 mini harvests (both combined weren't enough for a batch).
PrimaryLambic (WYeast blend), Local Lambic (spontaneous fermentation), Flanders Red with ECY02, Sour Rye (w/BugCounty)
SecondaryFlanders Red, Frambrozen, Grimm V2
Bottled Burton Ale, Wet Hopped IPA, Roese Kriek, "Grimm" RIS 23%, Saison Du Flood,"Warrior" IIPA 17%, "Oaked Warrior" IIPA 17%
Kegged Hip Hop IPA, Chocolate Cream Stout