On our tomato plants, the bottom leaves have solid brown spots and spots with beige centers. What do I do?
Tomato leaves get several leaf spot diseases. Some start at the bottom of the plant and get splashed upward by rain and watering. The beige centers suggest Septoria leaf spot, but you probably have more than one disease. Remove the infected leaves. Try to pinpoint the diseases by using the diagnostic chart in the Home and Garden Information Center's tomato integrated pest management publication (on the HGIC website under "Publications"). There is more information on each disease at the website's "Problems" section.
I'm going to put in a 125-foot-long rose hedge along a fence in full sun. Could you suggest an 8- to 10-foot evergreen shrub to plant on the end?
You're mainly limited by what stock your local nurseries carry. Read plant tags carefully for height before you buy, because labeled heights sometimes refer to only 10 years of growth, with annual pruning. Varieties of junipers, hollies (some with good berries for birds), chamaecyparis or cryptomeria should work for you.
Regarding the long rose hedge, keep in mind that whenever a lot of one species is planted for uniformity, the lack of diversity encourages insect and disease issues. When you lose a plant, it is difficult to restore uniformity. For that reason, diversifying the planting with groupings of several species is ultimately easier to maintain and more natural-looking, too.