Ask a Question forum: Need help with cosmos seedlings please :)

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Raleigh (Zone 7b)
Feb 21, 2018 12:14 PM CST
My husband and I planted cosmos seeds this past Saturday (Feb. 17th) and they already sprouted. This sounds like good news except that they were in with vinca, which have not yet sprouted and require total dark in order to germinate. I have moved the cosmos (in a 13x9 glass pan until my trays come Friday) to a window until my lights come (also on Friday!) but what do I do now? Just keep them watered and happy? How long do I wait until putting them into the ground? They are in peat pots (5 of the rows fit in a 1020 tray for a total of 50 cells) and I was going to put those directly into the ground when the time comes. Am I going to have to transplant them into larger pots before they go in the ground? Can you offer any advice at all? I'm considering these plants my grandbabies and want to take extra good care of them Smiling Thank you so much!
Thumb of 2018-02-21/Picklesfoley/e833e0

Thank you for all your help! We're new to this but learning quickly :)
Name: stone
near Macon Georgia (USA) (Zone 8a)
Plant Identifier Garden Sages Million Pollinator Garden Challenge
Feb 21, 2018 4:34 PM CST
I have orange cosmos seedlings coming up everywhere... Unfortunately, April 11 last frost date, my cosmos don't stand a chance.
I don't place much hope for your cosmos either.
How I plant cosmos and zinnia... Scatter seed in large nursery pot, separate when large enough to handle. Your seedlings aren't.
I don't bother with those tiny peat pots or those shallow trays... Not enough room for roots.
Can't tell you how many times I've watched people lose their plants in those tiny pots... No room for roots, means delicate plants... Which do not thrive when planted.
They like to pack a ton of plants in a tiny amount of space at the nursery, but they don't plan on reaping the consequences of that.
There's plenty of time to start over. I plant seeds that I collect off the same season plants and get If I can plant seeds in August... Plenty of time for you to experiment.

I suggest taking the tray outside while temps are above freezing... That's where all my plants have gone.... When 30s are predicted again, I'll bring my plants back inside.
[Last edited by stone - Feb 21, 2018 4:38 PM (+)]
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Name: Janine
NE Connecticut (Zone 6a)
Cat Lover Seed Starter Herbs Plant and/or Seed Trader Million Pollinator Garden Challenge
Feb 21, 2018 4:49 PM CST
BTW: when a seed is notated as requiring dark to germinate it just means the seed should be covered with soil/mix/whatever. It would be fine to put the pan in a window/under lights.
Name: Philip Becker
Fresno California (Zone 8a)
Feb 22, 2018 10:30 AM CST
Peat pots are Ok. Just be sure to bury/cover them with soil when you plant them in ground. Otherwise, peat pot dries out, and prevents the roots from penetrating the peat pot.

Getting your lites tomorrow Hurray!
You also need a little cheep fan to have blowing on seedlings, it makes them sturdy. A plant warming pad, under trays, till seeds sprout.

Are you getting LED grow lites ? There so cool burning ! That plants can grow, right up against them. Keep LED lights , just barely above seedlings.
Any other lites, close as you can without burning seedlings.

Sorry, if I'm telling you things you allready know. But, I like refresher courses. 👍😀

Good Day !
Ta Ta !
Anything i say, could be misrepresented, or wrong.

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