When my roses bloom the blooms are much smaller than before. why?

Hi,

Click below to read an article that explains various reasons why that might happen. Wishing you the best.

http://homeguides.sfgate.com/causes-small-blooms-roses-69627.html

They are lacking in certain nutrition. I feed mine banana peels and there is no end to the blooms I get. My neighbors stop and ask me how I get so many blooms all summer long. I have also been known to blend egg shells, coffee grounds, and banana peels in the blender once a year with a little water to pour at their base also. Most the time when we have bananas, I save the peels and just put them at the base of the bush behind them. Be sure they get a good drenching of water once a week at least and more in hot summer days. Hope this helps.

Spray your plants with a mixture of water and Epsom salt. Don't forget to spray under the leaves too. A couple heaping tablespoons to one regular size spray bottle. I wouldn't spray them while in direct sunlight, but my bf does and he's never had scorched leaves. I'm not that lucky though.

Depending on the type of rose, if you don't prune heavy enough then the roses will come back a bit smaller.

I use Miracle Grow every year and my roses flourish, large blooms and I don't have a green thumb at all.

Sounds like they are reacting to the heat. Blooms do become smaller when stressed by heat.