Q: Is it true that cigarettes should not be smoked around tomato plants? A: About 40 percent of cigarette tobacco may be infected with a tobacco mosaic virus that is not killed in curing. If you touch infected tobacco and soon afterward touch the tomato plant, it may become infected. Pepper and potato plants are also susceptible to some degree. Tobacco-chewers also can spread the virus disease. Washing your hands in milk after touching the tobacco can remove the virus. Q: I planted tomatoes and beans in the back yard, where grass had been growing. After the heavy rain last week water was standing there for two days. Is this serious? A: Poor drainage can cause serious damage to the plant roots. When the oxygen supply is cut off or depleted, the roots may die. Q: How long can pansies keep blooming in the spring? I've seen some blooming in June, though mine almost always quit on me in mid-May. A: Pansies bloom best in early spring when day temperatures are mild and night temperatures cool. Some new varieties are more tolerant of hot weather and bloom much longer. Mulching them with medium-coarse peat or a 2" layer of pine bark will help make them bloom longer; it checks water evaporation and controls weeds. Pansies are very shallow-rooted and suffer quickly from insufficient water. Q: What's the difference between a determinate and an indeterminate tomato plant? A: The determinate plant terminates its stems in flower clusters, practically all of the fruit ripens at the same time, and then it's through. The indeterminate plant continues with elongation of stems and continues to bloom and bear fruit all season long. The determinate kinds are used mostly by large growers who can harvest the entire crop at the same time. Q: $ is zoysia really a wonder grass, as some claim? I'm thinking about planting plugs of it. A: Meyer zoysia has dark-green leaves and once well established is usually resistant to wear and week invasion. It will grow in nearly all types of soil. After the first heavy frost the leaves lose their green color and remain straw-colored until warm weather in the spring. When plugged into a bluegrass lawn, low mowing (about 1", and frequent fertilization in spring and summer are required for good growth; but these are disastrous for bluegrasses and fescues. Q: I have a miniature orange tree I grew from seed. It's nearly two feet tall and gets green oranges; but when they're about the size of a nickel they all drop off. Why? A: Probably because they don't get enough light. They require very good light, preferably a lot of sunlight. Q: What's the best way to store my left over vegetable seeds so I can use them next year? A: Keep them in a tightly sealed jar in the back of the refrigerator. Q: How far from the house should I plant my yews? A: A general rule is to have at least four feet between the house and the shrub. Small-growing yews and other small-growing shrubs such as dwarf yaupon or Chinese holly may be planted as close as three feet from the house. In some contemporary designs, large-growing shrubs are placed as near as two feet from the house, but they need to be sheared almost every year. Q: I don't have a place to plant tomatoes where they will get full sun. Can they be grown with very good light but no sunlight? A: Plants and situations vary, but in general at least half a day of direct sunlight is required to grow tomatoes, and sunlight all day long is much better.