If the tree is too large to spray or reach all the fruit, reduce the height by removing tall branches. Do not butcher off the top. If the roots appear too dry or shriveled, soak them for several hours before planting. Keep the soil moist but not soggy. You'll be surprised how many flowers don't mind the cold.
Pansies can freeze solid and perk right back as they thaw.
Other hardy choices include snapdragons, daises, sweet Williams and calendulas. Follow label directions when spraying. Begin by spreading 3 to 4 inches of organic matter over the area. Spade or till these ingredients into the top 10 inches of soil. Follow with a deep irrigation to flush away the salts, and then plant your desired crop.