You'll also need lime-sulphur, a sprayer, compost mulch and some liquid seaweed. And I also like to have a rag soaked in tea tree oil or diluted bleach to sterilise my tools between roses.

can be a problem if you are specifically allergic or sensitive to sulphur. People who are not allergic are generally not affected by these compounds. The sodium benzoate in lime cordial is also not ...