According to David Coton, that is the question asked by the Horticultural Trades Association's National Garden Gift Vouchers Scheme, who want to increase awareness of the positive contribution plants can have on people's lives.
Heating will be a deciding factor on the variety of plants you are able to grow in a greenhouse and the number of plants that can be kept over winter.
The temperature during the winter shouldn't dip below 10C and throughout the year the daily variation shouldn't be more than 10C, this can be controlled by a combination of heating, ventilation and insulation.
To heat your Greenhouse you have a choice of tree main types of heater that you can use if it is a domestic greenhouse. Of course all have their advantages and drawbacks and below I have listed these in an easy to follow list.
It's important to know about them, this way you will know which one will suit your needs and situation perfectly. The three types available are Electricity, Gas and Paraffin.
There are also renewable energy sources available to use which I will go through below the list.
Solar energy or wind turbines may become a consideration in the future but at the moment they are far too expensive due in part to the poor heat retention qualities of a greenhouse.
Spent cooking oil is used occasionally commercially but is messy, smelly and not really suited to small scale production.
A summer sales report from internet retailer Amazon has revealed some interesting gardening trends and Nathan James Dodd has discovered that we are becoming a nation of indoor gardeners.
During September it's rewarding to look back at what your have achieved in the garden during the summer and, like Nathan James Dodd, consider the gardening jobs that are required as you prepare for the autumn.
When September arrives autumn is just around the corner and, with falling temperatures as well as leaves, Dan Everton has plenty of jobs around the pond.
The increasing trend for eating and entertaining outdoors seems set to continue and La Hacienda wood fired ovens, that can be used to cook and grill an impressive range of food, have caught the attention of Nathan James Dodd.