Some flower seeds are tiny and it’s easier to germinate them by scattering them on en masse on a seedling tray. Once they germinate, it’s best to prick them out and transplant them into either soil blocks or cell trays.
In this video, I’m demonstrating how to prick out tiny seedlings into soil blocks. These are snapdragon seeds, but the principle is the same no matter the type of seeds.
It’s best, in my opinion, to prick out when the seedlings are young – I don’t even wait until they’ve grown their true leaves, as some may advise. When the seedlings are younger, their root system is not as long and it’s much easier to get them transplanted.
Thanks, Heddy! I think I let my Zinnia seedlings get too tall before prickling. They are a bit leggy! :) Going to move the others that germinated now. Question: When they are in the squares, does the tray go into the sun? I’m not able to find the video to catch up on that step of care. TY!
If you find your seedlings are looking leggy, when you prick out to transplant, transplant them in deeper. For all your other seedlings that will be germinating, make sure they are place immediately outside in the sun as soon as you see 50% germination or if using shop light indoors, make sure the lights are 2-3″ away from seedling tray. Hope that helps!