Betsy, First, thanks for the quick reply. This is my first time emailing to this forum. What have you been feeding your plants? I have feed all the plants in my garden twice. Once during initial planting and a second time approximately four weeks after the initial feeding with Vigoro Tomato & Vegetable Food 12-10-5. Are they outdoors or in a greenhouse? Outdoors. What sort of weather and watering are they experiencing? I live in the San Francisco Bay Area. During the day the temperature varies from the low 70's to the 100's during intermittent periods. During the evenings the temperature will drop to the mid 50's. There is some fog overcast during the morning but that is not frequent. I water the plants as they need it. During the first two to three weeks I kept the plants moist to semi-moist. Now that the plants are mature in height I water less frequently and allow the dirt around the plants to go dry. Are your other varieties heirloom/OP's or hybrids? I do not know how this answer this question. The plants were grown in a local nursery, Kawahara Nursery, and are described on the plastic plant tag as indeterminate growth, will mature in 70-75 days, and will produce 1 oz. fruits of golden yellow. Incidentally, the Yellow Pear plants are the tallest tomato plants in my garden, over 6' 6" in height in cages. Thanks, --Olie San Ramon, CA > Olie, > A few questions -- what have you been feeding your plants, are they > outdoors or in a greenhouse, and what sort of weather and watering are > they experiencing? Are your other varieties heirloom/OP's or hybrids? > What is your geographical location? > > My yellow pears seem a bit more susceptible to chills and abundant rain > than my other varieties, so they may just be more vulnerable to yellowing. > Here's hoping it's an environmental/nutrient issue and not a disease > problem. > > Betsy > Fairbanks, Alaska > >