Perennials: If the ground is frozen, finish mulching perennial and bulb planting beds. Place evergreen boughs over the mulch to keep it from blowing away. Protect rose bushes by adding soil around the graft.
Flowers: As new catalogs arrive discard the old ones. Soon it will be time to think about ordering for the spring.
Vegetables and fruits: If raspberries were underperforming and produced crumbly fruit they may have a virus. If so they should be replaced with resistant varieties and planted in a different area. However, some raspberry plantings will survive for 20 years or more.
Trees and shrubs: A live Christmas tree should only be kept indoors for a week to 10 days, then moved to a shady cool area until it can be placed in its (hopefully) pre-dug hole and watered well all winter. A cut Christmas tree should have its trunk recut an inch or so before placing in a bucket of water for a day or so, then sprayed with an antidessicant before bringing in for decorating. A cut tree can absorb a quart of water a day so keep the stand container full.
Lawns: Spread gypsum to areas adjacent to roads to minimize salt damage.
Houseplants: Some pointers for the care of gift plants: First, poke a hole in the decorative wrapping paper and place on a saucer to catch water. The poinsettia is highly susceptible to injury from chilling drafts. Soil should be kept moist to touch but not soggy wet. The color lasts best if the plants are in a west or east window. If the bottom leaves turn yellow the plant is too wet. Keep a cyclamen in the coolest spot available. Keep the soil most, not wet. The kalanchoe likes bright sun (it is a cousin of the jade plant) and water thoroughly after the soil dries out. After the flowers fade cut back the stems to the tops of the leaves and feed to encourage rebloom.
General: When time permits make a spreadsheet of garden pests and problems and the timing and products for treatment. Haphazard treatments are a waste of time and resources.
Susan Henry, master gardener with Cornell Cooperative Extension of Westchester