This will flower for sure next year👍 I've started some off from seed in the last 2 months in the hope they'll flower next year.thet are "short lived" perennials, but as Gary says, they can last several years, but will eventually fizzle out & die off.
Great, this tray can go out during the day then. Free up a bit of space when I can plant them up as my marigolds and petunias for a start are still a bit behind!! Everything else is getting there, but they all seem to be growing slowly! Or I’m just impatient!! 😂 @ublaszko
I tend to put mine on a windowsill and then leave a gap for the outside air to circulate around the seedlings. Perhaps you could leave the door ajar in your greenhouse during the day. I only do it for 10-20 minutes a day just to make them more sturdy.