There are so many plants in the world, coming in all shapes, sizes, and colors. Depending on where you live, though, sometimes it feels like you are very limited as to what you can and can't plant.

DENVER — We all love plant shopping. Great. Do it. Plants grown in a greenhouse, however, need to be acclimated to outdoor conditions. Expose them gradually to the sun as well as night temperatures.

Planting the first vegetables, flowers, or shrubs of spring marks a new year of gardening, but growing plants in a greenhouse can mean that season never has to end. Whether heated or unheated, a ...