seed in rockwool
- Thread starter BigJon626
- Start date
Little Tommy
Well-Known Member
Not until the seedling breaks out the top of the rockwool.
taipanspunk
Active Member
...correct me if I'm wrong, after the seeds crack and your put them into the rockwool (or starter block, or stg, or whatever starting medium) they need to be placed under light (humid and higher temp). The light then is an environmental trigger for germination to start the sprouting process...
Little Tommy
Well-Known Member
No light is necessary until the seedling breaks through the top of the medium.
BigJon626
Well-Known Member
see this is what im talking about lol ive heard what bolth of you guys are saying. i always thought that the plant broke through the top of the soil because it was heading twords the light(but thats just my opinion with no sci ev lol). but ya its my first time using rock wool with seeds so i dont know
taipanspunk
Active Member
Little Tommy
Well-Known Member
Usually takes 48-72 hours depending on environment.
Pew
Active Member
The rockwool should stay damp. How fast it will dry out depends on your environment, the dome should slow (or prevent) them drying. You *may* not need to provide any water before seeing a sprout break the surface.
rjl
Member
4 white widow seeds from Nirvana.
#1. germed in paper towel / distilled water. After 2 days all seeds cracked and root showing.
#2. placed seeds in saturated rockwool cubes placed in hume dome w/lights on 24/0.
#3. After 4 days no further growth.
#4. removed seeds from rockwool & placed in soil with superthrive and 20-20-20 nutes, mixed to manufacturers specification or less.
#5. next day one seed showed growth above soil approx 3/4 of an inch.
Trial and error is an ongoing thing in botany
#1. germed in paper towel / distilled water. After 2 days all seeds cracked and root showing.
#2. placed seeds in saturated rockwool cubes placed in hume dome w/lights on 24/0.
#3. After 4 days no further growth.
#4. removed seeds from rockwool & placed in soil with superthrive and 20-20-20 nutes, mixed to manufacturers specification or less.
#5. next day one seed showed growth above soil approx 3/4 of an inch.
Trial and error is an ongoing thing in botany
Pew
Active Member
Just broke one in half by squeezing, lol.. the wrist flick is safer..
Pew
Active Member
Technical, From 'growers bible'
"Germination:
During germination moisture, heat, and air activate hormones (cytokinins, gibberellins, and auxins) within the durable outer coating of the seed. Cytokinins signal more cells to form and gibberellins to increase cell size. The embryo expands, nourished by a supply of stored food within the seed. Soon, the seed's coating splits, a rootlet grows downward, and a sprout with seed leaves pushes upwards in search of light.
Cannabis seeds need only water, heat, and air to germinate. They do not need extra hormones to germinate. Seeds sprout without light in a wide range of temperatures. Properly nurtured seeds germinate in two to seven days, in temperatures from 70-90'F (21-32·C). Household water contains enough dissolved solids (food) to nourish seeds through their first few weeks of life. Although seeds need only 30-50 ppm of nitrates before they germinate, any more will disrupt internal chemistry. Some growers prefer to use distilled water that contains virtually no dissolved solids to germinate seeds. In fact, a high concentration of dissolved solids (salts) in the water will actually pull moisture out of the seed!
Some seeds have a very hard outer shell, testa, and must be scarified to allow water to penetrate. To scarify, line a matchbox with a piece of fine-grain sandpaper or emery board. Put the seeds in the matchbox and shake for about 30 seconds. Remove the seeds, and make sure they have been scuffed a bit. Just a little scuffing will allow water to enter and set germination in motion."
"Germination:
During germination moisture, heat, and air activate hormones (cytokinins, gibberellins, and auxins) within the durable outer coating of the seed. Cytokinins signal more cells to form and gibberellins to increase cell size. The embryo expands, nourished by a supply of stored food within the seed. Soon, the seed's coating splits, a rootlet grows downward, and a sprout with seed leaves pushes upwards in search of light.
Cannabis seeds need only water, heat, and air to germinate. They do not need extra hormones to germinate. Seeds sprout without light in a wide range of temperatures. Properly nurtured seeds germinate in two to seven days, in temperatures from 70-90'F (21-32·C). Household water contains enough dissolved solids (food) to nourish seeds through their first few weeks of life. Although seeds need only 30-50 ppm of nitrates before they germinate, any more will disrupt internal chemistry. Some growers prefer to use distilled water that contains virtually no dissolved solids to germinate seeds. In fact, a high concentration of dissolved solids (salts) in the water will actually pull moisture out of the seed!
Some seeds have a very hard outer shell, testa, and must be scarified to allow water to penetrate. To scarify, line a matchbox with a piece of fine-grain sandpaper or emery board. Put the seeds in the matchbox and shake for about 30 seconds. Remove the seeds, and make sure they have been scuffed a bit. Just a little scuffing will allow water to enter and set germination in motion."
genuineapbts
Active Member
Everyone has a different opinion on this as you can see. lol This was something I asked too and everyone gave me different answers. I ended up just putting the seeds in the rockwool, then put the rockwool in the hydroton under a 1000 watt mh. Everyone freaked out when I told them that but thats what I did. They all up out of the rockwool within 1-7 days. I just hand watered them for a while and then turned my res on. As for squeezing the rockwool Ive heard you shouldnt do that. You are supposed to kinda shake them off by like flicking your wrist.
I have found you just have to take everyones advice and try what you want even if it is different then what most people suggest. Keep a log or journal so you know what worked and what didnt. Im on my first grow and have learned a ton in the last 4 weeks. lol Good luck!
The Coral Reefer
Member
Seeds dont need light until they sprout and even then they dont need a lot of light. But the seeds DO like humidity and a little warmth. I have a rockwool holder with a clear plastic lid and i put it on top of the toaster over for like 5 or 10 minutes until it gets humid and the plastic lid has water vapor on it. And I dont water the rockwool at all. I let the sprouts grow then transfer it to my hydroponic setup.