I use coconut coir. Sterile, holds moisture yet is free draining, easy to tell when you need to water. Try it! 100 percent Waves petunia germination. On Mon, Feb 20, 2017 at 1:20 AM, Mike Rummerfield <mikerumm@gmail.com> wrote: > It's not inexpensive (but goes a long way), but I've also found Great > White mycorrhizae to be effective in pots. > > Mike > Z7, western WA > > On Sun, Feb 19, 2017 at 9:58 PM, Diane Whitehead < > ldiane.whitehead@gmail.com > > wrote: > > > A non-member has suggested this: > > > > Also available in powder form to add when watering. Great White is the > > one I'm using to good effect. > > > > > > > > On 2017-02-18, at 5:55 PM, Tim Eck wrote: > > > > > You could try a potting medium with mycorrhizae and biofungicide. They > > can > > > make a difference. > > > > > > > _______________________________________________ > > pbs mailing list > > pbs@lists.ibiblio.org > > http://pacificbulbsociety.org/list.php > > http://pacificbulbsociety.org/pbswiki/ > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ >