Hi. I cracked an OG Kush seed last week using the paper towel method. I planted it in potting mix after it sprouted a tail. When the seedling emerged from the ground, the seed casing was clamped over the cotyledons. After a day it still didn't fall off or loosen. I tried to pull it off and I ended up tearing the tips of the leaves. It's recovering now but it looks kind of crappy.
Also, when germinating, I've had a few seeds that have only cracked open a little. It opens enough to see a green shoot inside, but not enough to let the shoot out.
What should you do in situations like these?
Also helps to scuff up the outside of the seed before germinating like rolling up a sheet of sand paper and having the seeds get shaken up in there. It will allow for better moisture absorption.
Take a match box and cut a peace of sand paper to fit in the box, then place your seeds in it and shake!
This is classic scarification.
By Vanessa Richins Myers, About.com Guide
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Definition: seeds with hard coats may need to be scarified - the process where the seed coat is modified in some way so that moisture can enter and germination occurs.
There are several methods of scarification:
- Soaking the seeds in hot water
- Using a file or sandpaper (one must be careful to not go too deep and damage the embryo inside)
- Acid (this can be quite dangerous and you must follow directions carefully!)
The type of scarification will depend on which seeds you are germinating.