6,340 Garden Web Discussions | Growing from Seed

Hard to avoid a peat-based mix since 99% of them are nothing more than peat, perlite or vermiculite, and some lime to neutralize the pH. To that, some manufacturers will add various forms of fertilizers to their growing mixes (not the seed starting mixes).
But I would also disagree that it is the peat based mediums that increase the likely hood of damp-off. Soil/dirt based mixes have a far greater incidence of damp-off associated with them. But primarily, damp-off is caused by excess moisture and that lies in the hands of the gardener. ;)
Here are several previous discussions on various mixes - note the distinction between sterile seed starting mixes and growing/potting mixes.
My personal preference is ProMix BX, recommended by many, but it is not available everywhere.
What brand of potting soil do you prefer?
There are many more that a search here will pull up for you but these should get you started.
Dave

Depending on what I am planting, I use different products. For the longest time I used a standard potting mix that is peat based. Now I tend to start most smaller seeds in a seed starting mix that is very light and fluffy. Larger seeds go into a commercial seed potting mix.



I think my first couple years, in order to maximize heat and light, I secured cardboard to the wire-mesh shelves I was using. I covered the pre-cut cardboard on one side with aluminum foil, made holes at the top, and twist tied them onto the shelves. When I needed to get to the flats I lifted up the cardboard like a flap. This also effectively served to keep the cats out. In fact, spare lengths of cardboard seem to have been used on many occasions to keep cats out of whatever it is they would have made a mess of. :)

I have found that my cats made the connection between the spray bottle and the plants. A few squirts at the cats have been helpful. I also leave the spray bottle "guarding" the plants, and the cats dont' go near. :-) I still keep the door closed most of the time anyway, just to be safe.

So glad you enjoyed my picture! I too get inspired when I see other people's seedling pics.
I read that impatiens like it cool at night. It was most likely the heat from the lamps and not the light that's been helping with the germination. Gotta keep them just moist! I went away and my husband almost killed them as he was just watering them every 2 days! BTW, it took a while to get buds though, but the plants really took off once I put them into window boxes.

started with bean,
I am so happy they germinated, I bet your right about the heat from the lights!
The seed coating is still on the tops of the leaves. So how often do you water?
I also am curious now that I got them growing, what now? I am clueless! ha ha! Well I still am trying to decide if it is to early to take off the dome? Do you fertilize yours and if so with what? And when? Questions, questions!
Again thanks so much for sharing your picture! It is worth a thousand words!
Do you keep yours pretty cool?

I started some a few weeks ago, no plastic, no heat mats...nothing. I did cover them with soil because I wasn't aware until after the fact, that they say aren't supposed to. They did fine.
I have also used gallon bags as a dome...this may sound crazy but this year I started about 16 different kinds of seeds and couldn't afford the seed trays with Domes at $7 a piece. I went to the dollar tree, got the little 8x8 alluminum baking trays that were 4 for a Dollar. they are very thin but I'm not cooking with them so it didn't matter.
I filled them with soil, watered, sowed my seeds and slid the hole thing into a gallon bag, filled with air....and ta-dah....had a small greenhouse. It worked GREAT for ALL of my seedlings.

Thank you all for taking time to respond and provide me with this information. I sowed them about 5 days ago - so I guess I have a long while to wait.
I also just put them out in trays ( recycled from plants purchased last year) in front of the patio door. No heating mat and no lights. Usually my plants do quite well with that.
Happy Gardening - summer is coming close!!

I have them fairly close under artifical lighting. The color is virbrant and the leaves seem healthy, so you'd think that both of those would suffer if light wasn't sufficient right?
So should I just stake them with a toothpick like you did and hope they toughen up? I think I'll do that anyways just in case.
Thanks!


The "moss" is actually mold and is a common thing when the potting mix is kept too wet and it often comes up for discussion here. It can kill the seedling so yes, it needs to be stopped. It leads to the disease called "damp-off" (lots of info here on it) and rots the stem at the soil line. Gently scrape off the surface what you can.
Most new to seed starting overwater and young seedlings need air in the soil as much as they need water. Water drives that air out of the soil mix. So, as already mentioned, you need to cut back on the watering so that the surface soil dries a bit and improve the sir circulation and then the mold will die. Part of the problem is using the egg cartons.
Very young seedlings can easily be transplanted to larger containers and root damage is actually much less at this stage than it will be later. It is called "pricking" seedlings. It takes a light hand but it is best to get them out of the egg carton ASAP and transplanted.
Dave

Kiddo:As Dave said-some seed have a short life-Onions,parsnips etc.Fresh seed each year is best but i would not throw year old seed out unless your long on money & short on time.Sometimes a little extra bottom heat helps.This year i had luck starting 4 varieties onions[old seed].I did seed heavier-25-50%.I got 50-88% germination.So during this cool[damn cold]winter it's fun to seed/grow under lights.Just my opinion--fez920 Wi Z5

They need to be planted almost immediately, within 24 hours, or bacterial contamination sets in. You can extend it to 48 if you rinse and drain them at least a couple of times a day. And yes, seeds sprouted at the same time will mature at the same time if planted. Just sprout some more later.
Dave

Here are a couple of previous discussions on your questions with lots of tips on how you can do it.
Shelves, lights, some plastic or reflective material to enclose the shelves, and a small fan is all you need.
Hope it helps.
Dave
Here is a link that might be useful: starting seeds in unheated garage discussions

Please post this on the Aquatic Plant Exchange forum.
Thanks.
Here is a link that might be useful: Aquatic Plant Exchange


Very interesting, my mom loves to plant any kinds of tree I'm sure she will be very interested.
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