![]() Many people think that wind and cold temperatures are the only reasons for hardening off. Minimum Tempīroccoli, brussels sprouts, kohlrabi, cabbage, onions, leeks, parsley It’s best to stay well above these temps. Here’s a handy temperature chart that lets you know when it’s too cold to leave them out: It’s good to know when your plants are actually in danger so that you only move them when needed. If you have a lot of seedlings, moving plants in and out can become a full time job. Related: I Tested the Top 4 Seed Starting Mix Products. You can mitigate both risks by stopping the hardening off process and bringing plants inside when the weather is bad. The two biggest dangers when hardening off seedlings are cold and wind. ![]() When putting young seedlings out in the sun for the first time, you have to be careful they don’t get “sunburned.” Two biggest dangers of hardening off This will be less “tiring” on your baby plants. The key point to hardening off is that you gradually build up the amount of time seedlings are outdoors. Hardening off is kind of a boot camp to prepare them for the war of natural selection that is waiting for them outside your home. Wind, cold or hot temperatures and sun scalding are all potential threats that can shock or even kill your baby seedlings.Īt the beginning, all they’ve known is the cushy life under the indoor grow lights or the hoop house. Hardening off is the process of gradually getting your plants ready for a more difficult outdoor environment. So what exactly is hardening off, and why is it so important? This in no way affects my recommendations. That means if you click and buy from my partners, I will make a tiny amount of money at no cost to you. This article may contain affiliate links. ![]() Let’s take a sec to get the legal words out of the way.
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