I hope you can help me.  For YEARS,  I've been planting Juliet tomatoes.  The plants ALWAYS grow to me oven 6ft. tall, and the tomatoes just keep coming and  coming and coming...  However,  for the past two years,  around the middle of August,  the leaves, starting from the bottom of the plants, start to turn brown and crumbly,  and this continues to progress upwards to the top of the plant. How can I prevent this from happening again this year,  for a 3rd year in a row? I live in the 19125 zip code,  in a row house,  the tomatoes are in the ground,  and in full sun all day.  Because of the way my yard is situated, there's nothing I can do about the sun exposure.  The yard is small,  and there's only one small patch of soil. Am I overwatering???  Should I just wet the soil, or the soil and the entire plant , when I water? Is it better to water tomatoes in the morning, or in the evening?  How often, since they're exposed to full sun from sunrise to sundown? Are used coffee grounds good to use around the tomato plants since the alley cats consider my yard to be their own personal litter box, and the squirrels think my yard is a free for all buffet?  How do I keep the squirrels from stealing my tomatoes,  or  just taking bites of them while still on the vine? ANY help you can offer me will be GREATLY APPRECIATED!!!