Paddy,
I have already given mine a couple of shots of the Quick Start as I don't ever want them to slow down in growing until fall so they harden off for winter. my last fertilizer on them is September here in Oregon. Using this treatment I get plants at are mature with numerous increase in one season. That way I can evaluate them and select the keepers and pitch the rest. No sense growing things I won't use further or tying up space with seedlings that are too small to evaluate.
Greg, the loss of seedlings is why I often transplant in the drizzle or right before a rain. The roots on these things are TINY so it doesn't take much to destroy them. This is also why I try to bring a little of the crusted potting mix along with the seedlings. I'l demonstrate this at the clinic.
Kevin