Many perennials and cool season vegetables can be started from seed sown in an unheated greenhouse or cold frame, then be transplanted in the open garden once weather permits. An advantage to this is you will get a head start on the planting season and have flowering plants earlier than if you were to start them outside, the exception being if you use the winter sowing method.

It is nice to walk into a greenhouse, even if it is unheated in the middle of winter on a sunny day. The temperatures are sure to be warm enough that you may not need a jacket or coat. You can sit in the greenhouse and prepare the flats, seed them and water them in comfort.

If the greenhouse is a bit chilly for you, using a small ceramic heater should warm it up enough to be comfortable while you are working in it. Rain barrels or other food safe plastic containers can be filled with water and depending on where you live, how warm your greenhouse stays, etc. they may only develop a small sheet of ice on the top of the container which can easily be broken up. If ice is a real problem, look into an animal water trough heater which could be used to keep the water from freezing.

Unheated greenhouses can be a source of real pleasure during the winter months. Don’t forget to add in a few cool weather vegetable crops such as lettuce or kale for your family to eat during the winter.

Here in the Mid-West seed starting is already underway for many of us. Here are some dates and ideas of what you seeds you can start in January.

January 1 – direct sow carrot seed in cold frames

January 4 – pansy, dianthus, snapdragon in flats

January 6 – direct sow peas in cold frames – weather permitting – pea seed will rot if it gets too wet and cold

January 10 – statice in flats

January 11 – parsley, cabbage, celery and onion in flats

January 15 – direct sow carrots and spinach in cold frames

January 18 – begonia and geraniums in flats

January 25 – well established seedlings that were started in flats can be moved into cold frames, weather permitting – remember to do this gradually so seedlings are not shocked unless you have a heated cold frame

Janaury 29 – direct sow carrots in cold frame

The multiple dates for sowing various seeds such as carrots are there for people who succession sow or who did not get the seed sown on the first date.