Lime sulfur winter spray, how do you do it?

[Orion_metalhead]

Horticultural vinegar in what concentration?

 

[Dabbler]

about 4 tablespoons per gallon - but honestly I just kinda do a glug or maybe two glugs per gallon - just watch out can brown out moss

 

[Piedmont Bonsai]

This is close to a 1:50, I do think I heard Bjorn mentioning this ration, but most of the recommendations I have heard are between 1:20 and 1:30 as leatherback mentioned.

Yes, he has mentioned before in a live q&a that this ratio is enough to get the benefits of the spray, but it won’t turn the trees a stark white color.

 

[Bonsai Nut]

I don't use harsh chemicals sprays - I use a vinegar spray dilution and so far(10 years)

Note that there is nothing "harsh" about lime sulfur if you dilute it at the proper ratio. Its effectiveness comes from its alkalinity. Vinegar works using the exact opposite principle - it is an acid. Both work, both have been used for centuries, and both (when applied properly) can be used on organic certified crops.

Note that your results may be impacted by how you water your plants. If you rely mostly on rain water (which is acidic) you may get better results with lime sulfur (alkaline) which works to reduce acidity in your soil and increase bio-availability of calcium and magnesium. If you use mains water to water your plants, and your water is alkaline, you may prefer to use vinegar.

 

[bwaynef]

I was coming here to mention that some formulations of Lime Sulfur are OMRI-listed, but the head nut just mentioned it. 4 kids of my own & a whole-neighborhood's-worth-of-kids in my yard at any given moment has me pretty careful about what I spray. (And if I'm being honest, the dozens of lizards in the bonsai area are a fun happenstance worth protecting as well.) I've found that LS (& dormant oil) really keep things in check so that later in the year I don't have to spray as invasively/drastically.