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Tomato growers: What's wrong with my tomato blossoms?

I have three large heirloom tomato plants in a self-watering (sub-irrigated) container that do not seem very happy:
1. light green leaves
2. mangled mutant-looking green tomatoes
3. brown, shriveled blossoms

Some of the brown blossoms have tiny mutant tomatoes growing from them, others are just sad, shrivel-y and crispy.
I have the container behind some low juniper bushes in front of my house - the only spot that I have with 6+ hours of direct sun.

Anyone have any advice for what I'm dealing with here?

On the bright side, the delicata squash next to these plants is very happy:

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Hi there..
well you have the classic case of running out of steam with the transparent leaves.
The steam for tomatoes is available potassium and calcium and boron.
Lower leaves then upper leaves will be empy of these nutirnets and will be suseptable to blight, not the other way around.
Once the tomatoe plant starts to set fruit it needs lots of potassium, if it is short in the soil or through foliar(feeding through leaves) applications it begins to pull it out of its extremities to fill the fruit, much like hypothermia in humans trying to save the most important part of the plant, to hell with any more fruits, lets fill one or two.
That is why your have blossoms that are not producing fruit, coupled with it may have rained or watered when it was trying to polinate and it didn't.
But with dried up berrys instead of fruit you have a lack of potassium.
You will see the delcata do the same thing, it will just yellow out a the base trying to fill the fruit.
More compost in areas of planting,(horse is great) and foliar potassium heavely after fruit begins to set.
Organically Fish emulsion with high P& K (last two numbers in a 5-10-20) or a base of potassium sulfate(not potassium chloride) mixed with water in early am or early evening sprinkled over the plants.
So a quick lesson in plant physiology 101. Notice I did not mention Nitrogen in any of this....the more nitrogen the more bugs you have...so be carefull of your fertilizer and keep the N number low in your plant fertilizer program when it comes to anything with fruit.
Available Calcium, potassium & boron is your friend...ok magnesium is important too just not too much.
Wow, Tim, thank you! I really appreciate the details and the education. I'll do my best to save the delicata. I'll let you know how it goes!

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