Post-Germination Care and Hardening Off

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How to start your vegetable garden seeds with success!

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What happens here

Once seeds in either peat pellets or trays have sprouted, typically within 7-10 days for tomatoes (check seed packet for specific germination times), it's crucial to remove the clear plastic lid from the greenhouse kit or provide good air circulation if using trays with covers. Leaving the lid on in direct sunlight will create a magnifying glass effect, overheating and killing the delicate seedlings. Avoid overwatering; peat pellets have sufficient initial water, and trays should only be watered sparingly until well after sprouting. Overwatering leads to damping-off disease, promoting mildew, mold, and fungus, which can kill young plants. Instead, check for dryness by lifting the tray (dry trays are light). When introducing sprouted seedlings to sunlight, do so gradually. Start with early morning or late evening sun, or partial shade for 15-30 minutes, slowly increasing exposure over several days. Acclimate (harden off) plants to outdoor weather and sunlight to prevent shocking them, especially when they are about 4-5 inches tall and show established root structures.

Goal: Successfully care for sprouted seedlings and prepare them for outdoor planting.

Tools and materials

Clear plastic lid

What they say

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can take your fingers and Pat them down but it just takes a little bit of time and it makes a big mess compared to the peat Puck's that's why I like the peat pucks this is a pain in the butt and that is so super easy and simple see what I mean please just make a big for lack of better terms just a big stupid mess they just make a big mess so there's a tray underneath our our seed starters right here that will fill up with water also so you could pour a little bit of water on this let it soak in come back in an hour pour a little bit more water let it soak in come back in an hour but again I think you're seeing right here what a pain-in-the-butt it is to do it this way versus using the peat pucks now for the seeds again the same thing applies if you're gonna put seeds in these you want to put your seeds in about twice the depth of the seed that you're sprouting okay we're going to set these to the side because I can't even put seeds in them right now they're gonna have to sit overnight or something we've made a big mess I don't like those I like the peat pucks it's so super simple now let's talk about what you do want your plants sprout so you've got all your seeds all planted it's been two weeks or so and you can tell by reading the back of the seed packet how many days to germination so these Roma tomatoes are gonna take seven to ten days to germinate okay so you've got your peat pucks your plants have germinated it's been 14 days and your little plant is about this tall I'm gonna come over there so your plants sprouted this one hasn't sprouted yet obviously but your plants sprouted now he's about that tall and he has a cotyledon that is the two leaves that emerge first from the seed they are not like the leaves for the plant okay those are the two leaves that initially get that first exposure to light and that's what feeds that seed and feeds the roots so that the plant grows up so you got your peat puck and you got a little plant in there maybe you've got two plants wait about five to ten days something like that after your plants have sprouted and go in and cull out the bad ones you plant this directly into the ground if you don't want to plant this directly into the ground you can pinch on here and tear off the little bag but I'm telling you you can plant it right in the ground in the little bag okay now once your plants have sprouted you want to get rid of this plastic sheeting if it's in direct sunlight because this will turn it into a magnifying…

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