Here’s a handy temperature chart that lets you know when it’s too cold to leave them out: Minimum “Stay Alive” TemperaturesAll temperatures are In Fahrenheit.It’s best to stay well above these temps. color: #000000; If you get a May snow storm and temps fall below 45 degrees keep them inside. On the other hand, sunlight isn’t as much of a problem. When I first started with seeds I didn’t know it was crucial to cut back the seedlings, and I didn’t know about hardening them off. Even if your plants received some sun through an indoor window as they were growing, hoop houses still present sunburn challenges for your seedlings. ... rivals, and industrial spies, amongst other threats, who wish to make money off the value of our information. If you don’t harden off the plants may be stunted, slower to produce, or even the unthinkable- death. (w[n].q = w[n].q || []).push(arguments); The metal hardening process is very important. You need to plan your hardening time to match your transplanting dates. @media only screen and (max-width: 767px){ I Tested the Top 4 Seed Starting Mix Products. This helps prevent transplant shock, the term used for seedlings that languish, become stunted, or die from sudden changes in temperature. The two biggest dangers when hardening off seedlings are cold and wind. Here's What I Know. Fortunately, the hoop house plastic covering seems to reduce the impact of sunlight. Avoid wind and cold. Hardening off your transplants is the important final step before planting your seedlings in the garden. I Tested the 4 Top Seed Staring Mix Products. Learn how your comment data is processed. You will probably be wasting your time, efforts and resources. Begin to put them outside 1-2 weeks before planting in your garden. I’m Bill Brikiatis. Posted on 05/18/2015, by Lorenzo Martínez Rodríguez . Related: I Tested the Top 4 Seed Starting Mix Products. max-width: 100% !important; (h/t to OldWorldGardenFarms.com) The benefits of hardening Hardening is the process […] This is important to prepare our seedlings for the harsher environment that exists outside their cozy little space in your home. var links=w.document.getElementsByTagName("link");for(var i=0;i