Tropicals & Tender Perennials: Seed germination ?, 0 by Kell

Kell wrote:
Also if your seeds are really fresh, they will germinate on concrete. LOL

Rockwool is used in hydroponics, Alistair. It holds oxygen even when wet so it is much harder to rot seeds or seedlings. It is a clean way to start seeds with no muss or fuss. I just wet my squares of rockwool, put in a tupperwear bottom, turn over to drain for a second and then push my seeds into the holes. I then enclose in a damp plastic bag and do not open it again till the seedlings are at least 2 inches high. It is so easy. I know there are instructions to mess with PH solutions and fertilizers but I have never used any of this. Also I have researched thoroughly the health issues some people have raised and I am very comfortable in using it. I found no real issues and I really looked into the info out there pro and con.

It is used extensively in other countries for greenhouse raised vegetables.

http://www.alternativegarden.com/site/library/rockwool.html

I use only the Grodan brand for I found cheaper brands just were not as good at all.
http://www.hydroponics101.com/sw57958.asp

Here is the bottom of the cubes with the roots so healthy.