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Miracle grow plant food

I bought some Miracle grow soluble plant food and was wondering how long it takes to dissolve in a watering can. Has anybody used it? I was thinking of putting a load in my Waterbutt and letting it dissolve wholesale and then using it from that. I’d make sure I used up all the water in one go as I wouldn’t want any nutrient enriched water ending up going down the drain if it rained and refilled the butt before I had used it all. 

Thanks, Joe


  • B3B3 Posts: 26,417
    Do you know if it keeps?
    In London. Keen but lazy.
  • joe.shimminjoe.shimmin Posts: 213
    I’m not sure what you mean? 
    I was going to put it in the waterbutt and use it all up in one go so it wouldn’t be hanging round. I can just imagine dissolving it each time in a watering can might take ages and thought that dissolving a load of it all in one go might save time.
  • B3B3 Posts: 26,417
    edited March 2021
    Will it go off or lose efficacy? I see what you  mean now. I'd mix it into a strong solution with a bit of water and then stir it in.
    In London. Keen but lazy.
  • fidgetbonesfidgetbones Posts: 17,230
    I stick it  in the bottom of the watering can and by the time the can is filled with water it has dissolved.
  • joe.shimminjoe.shimmin Posts: 213
    Brilliant, thanks guys, Joe
  • LynLyn Posts: 22,847
    I always use that one, fill watering can then add and beat with a stick, dissolves straight away.
    Gardening on the wild, windy west side of Dartmoor. 

  • KT53KT53 Posts: 8,449
    Unless you seal the water butt so no more water gets in to dilute the solution, your suggestion simply won't work.  It takes a couple of seconds to put a scoop of Miracle Grow into the watering can and you have a consistent solution to work with.
  • joe.shimminjoe.shimmin Posts: 213
    No problem. I just thought it might take a while to dissolve. As it dissolves straight away I’ll just use the watering can. Thanks 🙏
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