As any enthusiast knows, gardening is not only an enjoyable hobby, but it is also often hard, demanding work. Due to the confined climate of a greenhouse, situations can indeed change even more rapidly than in traditional gardens. As a result, it is very important to make use of a few simple techniques that will have your greenhouse in tip top shape for years to come.
Walk through your greenhouse every day. Unlike with more traditional gardens, the confined atmosphere of a greenhouse can lead to very rapid changes in conditions. In order to stay on top of these changes and make sure that you can address them in a timely manner, it is paramount that you are in the greenhouse on a daily basis to keep an eye on things. Set up wide paths that you can walk up and down and stay out in front of any potential problems.
Keep the thermostat set at 80 degrees F all year long. This is, in general, the optimal temperature for most plants--and so it is the temperature at which they will best perform. If it is too warm, then open the doors and allow a little cool air in. If it is too cold, set up space heaters.
Make sure there is air flow through the greenhouse. Many people want their greenhouses to be as airtight as possible in order to better control the climate inside. Unfortunately, this often has the adverse side effect of cutting off all air flow as well. Plants don't do any better with stale air than people do. Make sure there are small gaps around the doors to allow for a bit of air circulation.
Suspend the gardening flats above the ground. Raising the flats will primarily help with making certain that your plants receive proper irrigation by allowing for uninterrupted drainage, but it will also mean that you don't have to bend over as much when working on the plants. You can use tables, cinder blocks or 55-gallon drums as a means by which to suspend your gardening flats.
Water the plants regularly. Because of the closed environment, the plants in the greenhouse will not get the benefit of rainfall or dew condensation, so water regularly to keep the soil moist. You optimally want the soil in your garden flats to be damp to the touch, but not soggy.