January is a quiet month in a temperate northern-hemisphere garden, but it is the best time to plan the year ahead. Most work happens indoors and on paper, while the soil rests and the days slowly lengthen. 100% Local
Outdoors, the ground is usually too cold for sowing, so direct planting is limited to mild areas. Indoors, this is a good month to sow slow-growing seeds such as onions and leeks, and to keep houseplants ticking over with minimal care.
Timings shift with your climate. In colder zones, keep everything under cover and protect pots from freezing; in milder zones you may be able to plant bare-root trees and shrubs now. Indoors, plants near cold windows may need moving to a warmer, brighter spot.
In most temperate gardens, no. The soil is cold and wet, so seeds tend to rot. Wait until the soil is workable, usually in early spring.
Only when the soil is genuinely dry. Growth is slow and light is weak, so overwatering is the main risk.
January is the darkest month for most houseplants, so keep care light. Move plants away from cold window glass, water only when the soil is dry, and group them together to raise humidity slightly. Wiping dust from leaves helps them make the most of the little light there is, and there is no need to feed until growth resumes in spring.
Only for slow, hardy crops such as onions and leeks. Most seeds started now would struggle for light and become leggy, so wait a few more weeks.
General horticultural guidance for planning only. Verify locally.