Killing weeds in a moss bed?

[Sara B]

I have an area behind my wildflower bed in which I want to make a moss bed. There is some moss there - quite a bit in my wildflower bed-- but there is also a very persistent weed. How can I kill the weed without harming the moss? Thanks

[The Helpful Gardener]

Very easy, Sara. Moss loves acidic situations that most plants can't survive. You can use a vinegar water solution on a regular basis (once a week) or aluminum sulphate as directed to acidify the soil to 4.0 or 4.5; get a soil tester to make sure...

Scott