Coffee, Tea, or ?

Loudonville , OH(Zone 5b)

Does anyone use coffee grounds or tea bags for hydrangeas? I assume they would cause the soil to be acidic so would produce blue flowers, am I correct? Will tea bags decompose or do they all have to be opened? I have heard of people using coffee grounds for roses but never for other plants.

Dublin, CA(Zone 9a)

You can certainly use those as amendments if you want, any organic material is always good for plants. But at least in the case of coffee (and I suspect it would be the same for tea) most of the acidity comes out during the brewing process, so if you currently have alkaline soil and pink blooms, you're not going to get blue from using coffee grounds.

Columbus, OH

My hydrangea is loaded with blooms which are going to be pink. Is it too late for this season to change the color to blue?

Troy, NY(Zone 5b)

You need to acidify in the spring and fall but it takes a little time for the color to change. If you have endless summer or another that blooms on new wood later you may get some change.

I didn't treat this year and mine are purple rather than deeper blue so next fall and spring I need to acidify. Personally I enjoy the blooms regardless of color.

If you treat them try this:

I am a huge fan of their products.

Columbus, OH

Thanks Bookreader, I have an endless summer, so I am going to apply
the epsoma. Maybe I will get some blue as you said on my old growth.
I am also happy to have the pink for now. I suppose if it wern't for all the kind members of DG my plant would be dead. thanks again


Rosemount, MN(Zone 4b)

I just posted a thread about the Color Me Blue product from the ES folks. Have you heard of this product or it's success? Like I mentioned in the thread, I have heard horror stories about Aluminum sulphate burning up the root system. And I don't want to kill my new Twist and Shout hydr. - I haven't planted it yet. thanks for any info.

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