Products for creating heat
It is very important to keep the temperature inside the greenhouse under control. In winter and early spring, plants run a high risk of being damaged by frost if you are inattentive.
A thermometer is an indispensable aid for correctly regulating the heaters. When combined with greenhouse heaters and insulation (see the “Protection” category), you have taken the most important steps towards prolonging the greenhouse growing season with these aids.
A soil thermometer is a good help for determining when to transplant your plants. Some plants require a specific soil temperature before they will absorb nutrients. For instance, a tomato plant requires a soil temperature of 16 C, while a cucumber plant requires 18 C to absorb nutrients.
Tomato and cucumber plants are often sold in the month of April. At this time of year, the soil is far from being warm enough, so if you transplant them at this time, you will have to buy new plants again.