This post may contain affiliate links . When you purchase through nexus on my site , I may pull in a commission at no price to you . See myPrivacy Policyfor item .

Hardening off seedlings – What is it , how do you do it and why is it important to do for your garden success ?

When I first start garden I had never heard of hardening off your seedlings . I just straight sowed germ in my garden or put my purchased seedlings in the ground without really any thought . Those lead to various successes over the first years . Then I decided to start myseeds indoorswhich opened a whole new earthly concern of possibilities in the garden .

Herb, flowers, and vegetable seedlings in the hardening off process

Starting cum indoors gave me many opportunities to see new thing about plants and about the skilful ways to get them ready to be planted outside . season off seedlings is just one piece of the puzzle but it is an important pace to call back for plant success . Typically you start harden off your plants after you havepotted them upinto prominent pots .

Table of Contents

What is Hardening Off Seedlings?

indurate off seedling is the process used to get your indoor plant ready to be embed outside . recall about how you have been develop your industrial plant in idealistic consideration inside your menage . The plant are used to the temperature in your house and the light coming from the grow visible radiation . They are not used to direct sunlight and fluctuating temperature from daylight to dark . Maybe even the twist and weather conditions will be too much for them to treat .

Hardening off your seedling allows your plant to become habitual to the new environment in small amount of metre over several days . I like to set timers so that I do n’t leave the plants outside for too long during this process . This allows them to construct up a tolerance to changes and can help to reduce transplantation jounce .

How to Harden Off Seedlings?

The physical process of hardening off seedlings is quite easy but can be time - consuming depending on how many flora you need to harden off at once . commence the hardening - off process seven to fourteen days before you need to plant your plant in the solid ground outside . Ideally outside temperature will be above 45 degrees Fahrenheit when start the process . Your seedling should have at least 2 true leaves .

My works sit in10 in x 20 in traysso that I can move them around more easily . I can get 15 plants in a tray in their 3 - inchpots . So I can move 15 flora at a clock time by carrying the tray . I suggest setting timers as you do this summons so you do n’t forget about your flora . Trust me I have done it many times .

Day 1

On the first twenty-four hour period of the process , you should put your plant outside in a protected area away from jazz . Dappled sunlight to part shade is best . You should not expose them to head sunlight on the first day . Leave your plants out of doors in this protect louche country for about 1 - 2 minute and then bring them back inside . I usually begin mine out on our covered porch because it become mottled sunlight and only a little wind during the day .

Days 2-5

Gradually increase the time your plant life are out of doors by an 60 minutes or 2 a Clarence Shepard Day Jr. . Also gradually move your plants into more direct sunlight and areas where they might get some wind . This will help the industrial plant build up their tolerance to the outside component . check that to watch the weather in case there are any frosts foretell for this time . Do not exit your plants out of doors if there is rime in the weather account verify to bring them inside to protect from frost wrong . fetch them back outside when the chance of frost evanesce . I usually temper my plant off on my back pack of cards where I can hold the amount of hint they are receiving . They typically receive full Lord’s Day depending on where on the deck I set them .

Days 6-7

You should be able to leave your flora outside for most of the day now . Check overnight temperature to see if you might be able to leave them out overnight . Again be indisputable to watch the conditions report and move your plants inwardly if there is Robert Frost called for .

If you go with the 14 - day route just slowly summate metre they are in the sun . Increasing by an hr a day will work . Hardening off slower than 7 mean solar day is not a bad matter , it will ensure that they are ready to be found .

Why is Hardening Off Seedlings Important to Garden Success?

indurate off your seedlings is very authoritative to your garden ’s achiever . You do n’t want to move your baby plants right away from check precondition inside to all the fluctuations of the conditions out of doors . The plant ’s parting need to build up protection from the wind and sun . If you move them alfresco too promptly without hardening off your industrial plant they can become wind incinerate or sunburnt .

You made the campaign to baby your plants inside , take the supernumerary few days to baby your plants to ensure heavy success . If you move them alfresco too quickly they can go into transplant shock or even run out to thrive when put into the ground or an outdoor container . Those few wide-eyed footstep to harden off your flora can salvage you lots of garden heartache if you essay to move them too presently .

control while you are hardening off your seedlings that you keep their soil moist . Moving alfresco and into the sun can dry the seedlings out much more well . If your plants look stressed move them back into tincture and match to see if they want some H2O . You are now set up for successfully hardening off your seedling .

Broccoli and cabbage Seedlings sitting in trays during the hardening off process.

Broccoli and cabbage seedlings getting some sun during the hardening off process

Mixture of plant seedlings during the hardening off process

Mixture of herbs, flowers, and vegetable seedlings in the process of being hardened off