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rapid rooter plugs for seeds

Starting seeds in Rapid Rooters?

Earlyriser76
Well-Known Member

I don’t have good luck with germinating seeds or keeping them alive long enough to grow out. Most of my failures have come in the first two weeks so I am modifying what I normally do in an attempt to get better results.

My new plan is to use rapid rooters and just place the seed in them, then place the RR in a seedling tray, put 1/4″ of water in the bottom of the tray, put on a humidity dome and put all of it in the dark.

The temp in my closest varies from about 80-85*F and the relative humidity is 66% without the humidity dome. The RH jumps to 85% RH with the dome on.

Is 85*f and 85% RH too high and could this cause fungus problems? Is 66% high enough given the fact they are sitting in a 1/4″ of water?

chuck estevez
Well-Known Member
Sativied
Well-Known Member

Sounds like a recipe for cooking rotten seeds.

Don’t use a dome with seedlings, 66% is fine, so is 40. Seeds and seedlings do not require high air humidity level. And don’t put the rapid rooters in a layer of water. Instead add a layer of perlite or hydroton, put the rapid roots on those and water them. Try to keep the temp below 80.

I too soak seeds in (warm yet cooling down) water for 12-24 hours before planting them.

And place them under light.

Earlyriser76
Well-Known Member

That’s a brilliant idea! I will do just that.

I read two different versions. Some same put the RR in the dark to germinate and others say put them under light. Even the Rapid Rooter tray instructions say to place them in the dark to germinate.

Why is light so important when the seed is under cover anyway?

Sativied
Well-Known Member

Even though your temps are 80-85f in the space the wet RR will be colder and it will likely fluctuate. Putting light (not too strong, I use T8 ) above it helps keeps the temps in the RR stable. But besides that, if you’re already have a hard time germinating, they will likely not all pop the same day and seedling that grow up in the dark become stretchy and lanky (searching for light) fast.

Soaking them addresses both of those issues. If germination fails from improper environmental settings it’s usually shortly before cracking open (too much water, not enough oxygen, and/or too cold/warm) or when it just cracked. The longer that takes, the riskier it gets and the more important it becomes that the environment remain stable. Ideally you measure the inside of the RR for a complete day.

vitamin_green_inc
Well-Known Member

while the inside was 75

Earlyriser76
Well-Known Member

while the inside was 75

My first grow was a fist fight that I lost. I was smart enough to grow more seed than I needed and finally figured out what I needed to know enough to grow and harvest a few plants. I feel like if I can get my plants to live to two weeks old, I think I’ll have a good chance at finishing them.

I’m been trying to practice on bag seed and not having any luck germinating. I’ve order some expensive seeds and ready to try to germinate them but nervous they won’t germinate.

I’ve tried the paper towel method a couple of different ways and that bag seed didn’t crack. It could be just bad old seed but I’m not sure it’s not at least partially my method.

I’m thinking as soon as the seeds break the surface in the rooter, to plant them in a cup and move them to the tent under CFL’s at 12/12. The rooter won’t sit in the seedling tray for more than a day after they break the surface and won’t grow roots out of the rooter before they are moved.

First, I have to get them to germinate without growing fungus. Sativied’s idea of putting that rooter on top of a bit of perlite wicks the moisture up without saturating the rooter is a great idea. I am testing that right now to see what kind of moisture the rooter will hold and for how long while I wait for my seeds to arrive.

If you guys say put lights over the rapid rooters to germinate, I’ll do it, but it seems counter intuitive to me if seeds need dark to crack.

I don't have good luck with germinating seeds or keeping them alive long enough to grow out. Most of my failures have come in the first two weeks so I am…