My grandparents always called it “setting out plants.” We know the process of introducing our indoor raised or recently purchased seedlings to the outdoors as “hardening off.” Whatever you call it, the gradual introduction of your tender young plants to the cold, cruel world of the outdoors needs to be done with attention and patience. You wouldn’t just push your children out the door without some experience of what they were about to face, would you? Your plants are like your children. They need to adapt to conditions outside the home.
Hardening off is the process of acclimating plants to outdoor conditions. In some parts of the country, this process is well under way. In northern settings or places of higher altitude where the possibilities of frosts will continue for another two or three weeks, we’re still waiting. Timing is important. Many garden books will tell you that plants started indoors are ready to go out when its roots have filled the container. But if outdoor conditions are still too cold or wet, your tender plants may be set back. On the other hand, if they’re left in pots and their roots continue to grow, it may set back their growth. Transplanting into a larger pot is called for when outdoor conditions aren’t yet right. (more…)