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Yellow sulphur to make soil acidic?

AcidboyAcidboy Posts: 1
in Problem solving
Hi

long time listener first time poaster 

I have pink hydrangeas abs for the first 2 years I bought and added blue hygmdrangea powder. But if expensive.


I used some yellow Sulphur on my dahlias I’m overwintering and thought acid?? Can I just sprinkle that round my hydrangeas? And turn them blu3 :)

thanks for nay help

Posts

  • LoxleyLoxley Posts: 5,698
    Did the powder work for the first two years?

    I was at the National Hydrangea Collection, and their experiments with trying to get their hydrangeas to go blue (on slightly limey soil) were not encouraging. 
    "What is hateful to you, do not do to your neighbour". 
  • FairygirlFairygirl Posts: 55,117
    No. You can't alter soil long term by adding 'stuff'. 
    It's a place where beautiful isn't enough of a word....



    I live in west central Scotland - not where that photo is...
  • ObelixxObelixx Posts: 30,090
    If you want blue hydrangeas you need acid soil so try growing them in very large pots or raised beds filled with ericaceous soil and compost and water only with rain water.   trying to change the colour thru chemical applications is always going to be expensive and unlikely to be successful.  At best you'll get  muddy mauve colour.

    If you want blue flowers, try planting ceanothus instead.
    Vendée - 20kms from Atlantic coast.
    "The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
    Plato
  • edhelkaedhelka Posts: 2,351
    You can try. Here is RHS article about it:
  • josusa47josusa47 Posts: 3,530
    I bought two hydrangea "Glam rock", the colour is dependent on soil pH and ours is 8. So I planted them in pots with lots of bog-friendly peat mixed into the soil, and sunk them in the border with the other pink hydrangeas.  It didn't work, they just flower pink.
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