This is a great article. (link) this lady uses 1:5, that's one part ammonia to 5 parts water. And she does say you can use it stronger. (You have to do your own experiments like I did last year. ) The stronger solution was mainly for my daylilies because the flowers would be tore up each morning, by the time I got out there with a camera. LOL.
When I read an article in Fine Gardening a lady who commented said she used it full strength on everything. After that I was not afraid of it anymore. I have used it on everything, I have acidic soil and slugs love it here. I have not experimented on dahlia shoots, I am waiting for mine to sprout and I have a cheapo in a pot as the sacrificial plant for testing. The others in the yard are more expensive, wish me luck!
I was shocked that this woman said that you can reduce the slug population by changing the PH in your soil. She said after you spray the whole yard with ammonia you should do a surface dusting with lime and she tells you how. I might consider this!
Also don't forget ammonia is a foliage spray. It breaks down quickly into nitrogen and is absorbed by the plant. Good stuff!
http://www.hillgardens.com/slu...
