Tomatoville® Gardening Forums - View Single Post - Temperatures that interfere with pollination

**coronabarb** · June 28, 2013

I am being questioned on my FB page about the veracity of tomato pollen becoming sterile at high temps. Also, the question of blossom drop with high night temps has come up. I know I have this ingrained in my mind but cannot find a source to back me up. I do not find it in my ultimate authority, Carolyn's book. So, do I remember correctly? Pollen becomes sterile above around 95? How do high night temps interfere with pollination? 75 degrees or so? Is it dependent on how many days the heat occurs?

June 28, 2013	#1
coronabarb Tomatoville® Recipe Keeper Join Date: Jan 2006 Location: Roseburg, Oregon - zone 7 Posts: 2,821	Temperatures that interfere with pollination I am being questioned on my FB page about the veracity of tomato pollen becoming sterile at high temps. Also, the question of blossom drop with high night temps has come up. I know I have this ingrained in my mind but cannot find a source to back me up. I do not find it in my ultimate authority, Carolyn's book. So, do I remember correctly? Pollen becomes sterile above around 95? How do high night temps interfere with pollination? 75 degrees or so? Is it dependent on how many days the heat occurs? __________________ Corona~Barb Now an Oregon gal