05/17/2021
Have you ever been lazy for six months, then randomly challenged yourself to a workout that almost ended up killing you? No, just me? Okay.
Well, if you’ve put yourself through this, then you probably remember the feeling of still being sore on day three or even five. It’s a setback for sure, and the ongoing pain makes you wonder if your workout even made a difference. The good news is, it probably did; the bad news is, you suffered far longer than you needed to.
Imagine then how your vegetables, herbs and flowers must feel if they immediately go from a comfortable garden center greenhouse or south facing window in your home directly into an environment with ever-changing levels of sunshine, wind gusts, cold temps - and critters. Like working out, it forces improvement, but when too drastically it will cause stress, set backs and may even permanently injure your plants.
Hardening off is the controlled, increased exposure to to the outdoors that will help strengthen your plants for the long term without overdoing it - a sort of Couch To 5K for plants, which can be done in a week.
Gradual exposure to wind develops microtears in the stems, building them like miscle fibers; exposure to sunshine thickens the cuticle of the plants’ leaves, which is the equivalent of their skin, and helps protect against peats, high temps and drought.
For us in zone 4b it’s the perfect time to harden off our plants, and doing so will pay dividends all season long. Start with introducing your plants to a shady outdoor location on a day where the breeze is not too strong for a couple of hours. On day three, move to a spot that receives direct sunshine during the morning hours, then move to a sunny location indoors during the warmest part of the day. Add an hour to your plants’ sunshine curfew each day until day seven. Once overnight temps are over 50, leave them out overnight from day seven onward - or plant them - and that’s it!
Best wishes for peace of mind and happy gardening (and hardening) to you!