Fireplace wood ash
Is wood ash good to add to the rose bush soil?
Pinellas County Florida horticulture
Thanks for your question! Roses like a slightly acidic soil with a pH between 5.5 and 6.5. Most of our Pinellas County coastal soils tend to more alkaline than that. Wood ash is very alkaline and basically have a liming effect in the soil. So it would likely raise your pH which may already be on the high end. My guess would be that it would not be beneficial. However, you can test your soil to see where it is. If it did happen to be acidic then the ash (in small amounts) could be beneficial.
Here is a link to download the soil test sheet- instructions for sampling and where to send the test are included: http://soilslab.ifas.ufl.edu/ESTL_files/SS18700.pdf
Here is another link to growing roses in Florida: http://edis.ifas.ufl.edu/pdffiles/EP/EP33900.pdf
And finally, here is a short article on using wood ash in the garden from Purdue: http://www.hort.purdue.edu/ext/woodash.html
Please let me know if you have any further questions!