This is a resource post on the subject of hotbeds,it how to construct then and how we can use then to grow salads and vegetables earlier in the season as the hot bed temperature will be in excess of 8C (the ground temperature necessary for the germination and growth of many spring veg) even if there is frost.
NO Dig Hot Bed For Early Vegetables
This film is a month after we sowed the hot bed and it shows germination and growth we have achieved, also as the air temperature has risen and how this affects the hotbed
No Dig Hot Bed – Early Vegetables – April Update
This film shows the Hot bed in Summer and how it is still cropping even though it has now cooled and has not had any fertilizer applied
No Dig Hot bed Growing Agretti
This film shows how you can utilize the hot bed concept for seed germination which is especially useful if you have a pollytunnel or greenhouse with no electricity
How to make a Hot bed Propagator