I'd say in case #2, the soil is poor and/or deficeint in 1 or more micros.
I'd mix in some peat with a spoon of lime/plant and a dash of
micronutrients. Lime is better added 4-6 months earlier than planting. In
case #1, I'd be guessing that wash off from the roof may have something to
do with it since most shingles today are treated with antifungals which may
not be the most congenial showers for tomato plants.
Gary

"David or Eunice Boucher" wrote in message
link.net...
I've planted tomatoes in two different locations this year, and each seems
to have its own set of problems.

1. I planted some close to my house. They have grown well and have
developed some fruit, but some of the newer leaves have developed brown
spots. On some branches the brown spots have spread and caused all of the
leaves on that branch to shrivel and dry up. I tried spraying with a
fungicide/insect spray, but it didn't seem to help.

2. I planted some in a sunny part of the yard, but after a promising
start
the l;eaves began to turn yellow and the growth of the plants was stunted.
Several years earlier I had planted cucumbers in the same spot, and while
they did well the first year, the second year they started out ok but then
all the leaves turned yellow and they died.

Can anyone give a hint as to what might be causing these problems, and
what
I can do about it?