How long untill the clams/oysters start making new ones?
Oh, crap probably 2-3 years BUT the issue is where the little ones settle? The eggs are fertilized while floating in the water and then the larvae are free swimming. With the strong currents around here, as the larvae develop into the sedentary stages and settle, it could happen anywhere. I hope they want to stay close to my place, but in reality, that's probably not going to happen, considering this estuary is 5 miles long and so far I've only found any clams in a specific 150 yds of it up river from my place.
I'll just be happy if the clams I "plant" live where I put them. Then whenever I have a clam craving I can grab the rake and dig up a dozen or so in no time and not have to schlep the 1/2 in the soft mud to get to the guaranteed clam grounds...