Hot and Cold
Whether your greenhouse is heated or not will determine the types of plants you grow and the timing of your greenhouse gardening activities.
If your greenhouse is unheated you can use it to grow hardy plants in pots and containers to coax them into early flowering. You can sow and grow early salad leaves, hardy flowers and vegetables much earlier than you can outside. You can even get a head start with spring bulbs, planting them into pots in the autumn and then letting them grow in the protected environment of the greenhouse. Many gardeners also use the greenhouse as winter protection for more exotic patio and tub plants.
In a heated greenhouse the possibilities are endless. You can sow and grow a wider variety of plants much earlier and keep them growing for longer right into the winter. With greenhouse heating you can nurture your more tender plants during the winter months and protect them from frosts.