Dahlias
Q.

Ashes on my plants

Zone Butte, Montana zone 3 | Anonymous added on September 7, 2018 | Answered

I live in Montana in the middle of many current wildfires. It rains ash on some days leaving my plants with a layer of ash on the flowers and leaves. Should I be hosing off my dahlias, crabapple trees, roses etc to get rid of the ash? My husband said the ash won\'t harm these plants/trees. Thank you

    A.
    A.Answers to this queston: Add Answer
    drtreelove
    Certified GKH Gardening Expert
    Answered on September 8, 2018

    Probably no great harm to leave it on the plants short term until you get rains that will wash off the ash. But if up to me I would hose off a heavy deposit on and under leaves because it can block sunlight access and photosynthesis of sugars that nourish plant tissues, and it can block stomata that are openings for leaf moisture regulation and respiration. It may also have a drying effect.
    Heavy deposits of ash can affect soil chemistry and mineral balance, sometimes good sometimes not so good. After the fires are done and the winter rain and snow has taken the ash into the soil, you may consider running a soil test in spring to analyse soil mineral content and pH (acid/alkaline balance). And correct imbalances with recommendations from a soil analyst.

    00
    Was this answer useful?

    Log in or sign up to help answer this question.
    Did you find this helpful? Share it with your friends!

    You must be logged into your account to answer a question.

    If you don't have an account sign up for an account now.

    Looking for more?
    here are more questions about...
    Dahlias
    Join Us - Sign up to get all the latest gardening tips!

    Do you know a lot about gardening?
    Become a GKH Gardening Expert

    Learn More