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Old 06-09-2016, 01:52 PM
 
1,320 posts, read 3,267,248 times
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I have been growing these in pots for a few years and done quite well. This year I have a grape variety tomato plant. It is getting yellow flowers, but no fruit is growing. They just turn brown. I thought the bunnies were eating them so I moved the plant up high. Still the same. The plant looks healthy, but growing at a slow rate. I haven't changed anything I did from past years. Any ideas? I am in the Midwest .
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Old 06-09-2016, 02:04 PM
 
Location: Out there somewhere...a traveling man.
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Flowers probably not getting pollinated. You can get tomato pollinator at most Garden centers.
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Old 06-09-2016, 05:47 PM
 
Location: East of Seattle since 1992, originally from SF Bay Area
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They are self pollinating normally but require a bit of a breeze, you can gently shake the branches to help. How warm has it been? They will not set fruit if below 70 or over 100F.
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Old 06-09-2016, 09:58 PM
 
Location: Out there somewhere...a traveling man.
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Yes tomato's are self pollinating with the right conditions, but if it's hot/dry and there is no wind activity the flowers rapidly dry out. You can't wait several days for wind activity. I check for new blossoms every morning at their prime and use Blossom Set on all my tomato's with great success. Beats hand pollination when you have a lot of plants.
Pollinating Sprays for Vegetable Gardens | Home Guides | SF Gate
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Old 06-10-2016, 03:47 AM
 
Location: Near the Coast SWCT
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Quote:
Originally Posted by cdcdguy View Post
I have been growing these in pots for a few years and done quite well. This year I have a grape variety tomato plant. It is getting yellow flowers, but no fruit is growing. They just turn brown. I thought the bunnies were eating them so I moved the plant up high. Still the same. The plant looks healthy, but growing at a slow rate. I haven't changed anything I did from past years. Any ideas? I am in the Midwest .
Where in the "Mid West". Typically no fruit setting is a High Temperature thing. Tomatoes don't like it above mid 80s especially 90s. So perhaps the flowers started before it got hot, then the heat came and they got brown and fell off without fruiting.


I see Des Moines hit mid 90s yesterday. Wow!


Meanwhile here the Tomatoes are slow to grow because we barely pass 60s many times and dropping to 40s/50s at night.
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Old 06-17-2016, 05:58 AM
 
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IDK, it has been quite breezy here for days, and warm. I have always had too many tomatoes, and now I can't grow one small tomato. The plant is loaded with flowers, but still, all have turned brown. I haven't changed anything from years past. My flowers are doing great though....
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Old 06-17-2016, 07:07 AM
 
Location: Denver/Boulder Zone 5b
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I definitely think it's the heat. Just be patient - once it cools down, they'll start setting again. Interestingly enough, we've had some pretty hot weather the past two weeks in my area, including 5 or 6 highs above 90º, but our nights are cool, in the 50s, and my tomatoes are setting fine. The lack of humid air, but not bone bone dry either, is probably helping with that.
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Old 06-17-2016, 07:20 PM
 
Location: too far from the sea
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Where I live we haven't had hot weather yet but could it possibly be a potassium deficiency? Just a guess--probably the others are right about the heat.

Normally I just use compost for my vegetables but tomatoes are such heavy feeders and at flowering time they need to eat even more. I use 18-18-21 fertilizer at the time of flowering.
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Old 06-17-2016, 09:14 PM
 
Location: East of Seattle since 1992, originally from SF Bay Area
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I use bone meal, it makes a huge difference. I put it in the planting hole, and then work some into the soil every 2-3 weeks and water in well. Don't leave it on top of the soil, dogs and other creatures will be attracted.
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Old 06-18-2016, 10:30 AM
 
Location: Prescott AZ
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I think it's the heat. I planted 2 tomato plants in a raised bed and have tons of big ripe Early Girl and Beefsteak now. Be advised I am in Phoenix. When the temps got to be 100 or more, I used shade cloth to cover most of the big plants. Some of the little blossoms stuck out, and the tomatoes on those branches turned brown and mushy.

After our 120 degree heat tomorrow, I will see if I have anything left at all !!
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