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Here is a question for the experts here. All 9 of my tomato plants are big and all have green tomatoes growing. The grape has even already produced lots of yummy red snacks for my little daughter. They are all heirlooms.

But the two brandywine, my personal favorite tomato, are both turning completely yellow. They are in the same area as the others, they are not next to each other, but just THIS variety has yellowing leaves, it started on the lower leaves but now it’s all the way up.

What are these plants needing? (Dry adobe SoCal soil, I personally water the plants every day, haven’t “fed” much except foliar kelp spray)

Thanks!

I’ve heard yellow indicates too much water. Seems to be true for me.

Sounds like they might be waterlogged as in too much clay not enough drainage. Maybe just in a bad spot. You could always try replacing some of the soil.

But the two brandywine, my personal favorite tomato, are both turning completely yellow. They are in the same area as the others, they are not next to each other, but just THIS variety has yellowing leaves, it started on the lower leaves but now it’s all the way up.
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I’m not sure what that is, I’m pinging additional help, but they might already have seen this. My sister told me to be sure to take off all yellowing leaves when I started gardening, but she didn’t know what caused it.

I’ve never looked it up, because it wasn’t an issue. I am guessing that they need to be fed a good balanced fertilizer and maybe some addition P & K, if they are indeterminate.

Diana, tubebender, and TIK, including you on this ping to maybe help yaelle. Thanks.

Yaelle:"But the two brandywine, my personal favorite tomato, are both turning completely yellow.
They are in the same area as the others, they are not next to each other,
but just THIS variety has yellowing leaves, it started on the lower leaves but now it’s all the way up."

Sounds like they might have blight or fusariaium wilt, or verticillium wilt; are they growing where other solanacious varieties have been raised ?
You need to be cognizant of what garden varieties, or families have been planted, and where; that's why a home garden crop rotation map is helpful.
For Example :
the 'Solanaceae Family' includes: tomoatos, potatoes, peppers, eggplant; tobacco; and tomatillo.
If plants from the same family are planted in the same area/soil, there is a likelihood of passing a family disease along to the new crop.
By crop rotation, you minimize the possibility of having soil borne disease re-infecting new plants of the same family.(called: cross contamination)
The best online example of crop families that I have found for demonstration is found at Penn State :
https://extension.psu.edu/plant-rotation-in-the-garden-based-on-plant-families

An online example of sequence of garden crop rotation recommendations for the home gardener can be found at :
.. https://www.todayshomeowner.com/vegetable-garden-crop-rotation-made-easy/
This sequence of garden crop rotation maximizes the effectiveness of fertilization, while minimizing the cost,
since different plant types/ families have different fertilization requirements.