![]() If you are using peat pots, rip the edges open when planting otherwise they can wick moisture away from the plant. Do not break up or untangle the seedlings’ roots, unless they are especially root-bound (i.e., the roots are coiling around several times in the container). Be careful not to damage the plant stem and roots in the process of taking the seedling out of its container and planting it. Dig a hole deep enough so the plant stem will stay at the same depth as it was in its container (tomatoes, peppers, and eggplants can be planted deeper). Prior to transplanting, moisten the planting area and seedlings’ roots. To make the process as smooth as possible, plan your planting ahead of time using Planter, be sure your beds (or containers) are prepped, and have your tools handy. When transplanting seedlings the goal is to prevent ‘transplant shock’, which can stunt or kill them. After a week or two of this process, your seedlings are ready for transplanting! How to Transplant Seedlings # Once the seedlings are spending most of the day outdoors you can start leaving them outside overnight, but watch the forecast to ensure it won’t get too cold for your plants. Continue the hardening off process once the risk of extreme weather has passed. If the forecast calls for extreme weather (cold, heat, wind, storms), keep the seedlings inside. Each day, gradually increase the number of hours that the seedlings spend outside and the amount of sunlight they receive. On the first day of hardening off, take your seedlings outside to the chosen location, leave them out for a few hours, then bring them back in. Gather your seedlings together in trays or shallow containers - this will make carrying them outside and inside easier. ![]() Be sure the selected location is somewhat sheltered from wind. To start the process, find a partially shady location in your garden, or start the process over a stretch of a few cloudy days. With transplant dates in mind for each of your plants, aim to start the hardening off process about two weeks prior. Make sure your seedlings will be mature enough to be transplanted- they should have at least a couple sets of ‘true leaves’- but don’t leave it so late that they are outgrowing their containers. If you are succession planting, you may have multiple transplant dates to keep track of for each plant. Consider recent and forecast weather conditions and when you have time in your schedule for planting. Within the transplant window for each of your plants, think about when specifically you want to transplant. The transplant window in Planter is tailored to your growing location. ![]() To determine when to harden off seedlings, start by checking the ‘Transplant’ window in the Growing Calendar in Planter for each of the plants you plan on transplanting: But skipping hardening off is a gamble, and plants that do survive the transition might never recover fully. Some plants might survive being transplanted directly into the garden. Hardening off might seem like an extra step, but it provides some insurance that the seedlings you spent weeks nurturing won’t wither and die as soon as they get outdoors. Without hardening off, seedlings can suffer from sun scald, wilting, and wind damage. Hardening off is most crucial for seedlings raised indoors, but if you have enough time it can be helpful to harden off seedlings purchased from a garden center. Seedlings grown indoors take some time to build up their defenses to cope with more extreme sunlight, wind, temperatures, and drought outdoors. Hardening off is especially important for seeds started indoors, as they have been growing in unnatural conditions their whole lives. ![]() ‘Hardening off’ seedlings is the process of gradually getting them acclimated to growing outdoors. ![]() It’s important to ‘harden off’ seedlings and transplant them properly, to give them the best possible start in the garden. But without special care, the transition from growing indoors to the garden can stunt your plants’ growth and even kill them. If you started seeds indoors, at some point the itch to get them planted in the garden really starts to kick in. ![]()
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