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Written by Mary Strayer, Master Gardener
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Wednesday, 14 May 2008 |
It's getting close to time to set out the seedlings you started inside, or the ones you picked up at the local greenhouses. First of all, lets talk about the ones started in our homes from seeds, and now are pushing the second set of leaves. First of all remember that this is a big step for the seedling itself. It has been inside in a safe environment away from winds, rain, and bright sun. They will be facing possible drying out as well. The temps outside are different than the home temperatures, and this shocks the little plants easily.
To keep the seedlings from going into shock, try these hints. First of all, keep their stress to a minimum. I germinate my seeds in cell packs, and when they get their second set of leaves, I transplant them to larger containers, usually another larger cell pack or a peat pot. The peat pots maintain their shape, so you can plant them into the garden just as they are.
Another idea is to keep a small fan going while you are sprouting and after. This simulates the natural breezes, and the plants become accustomed to the air movement. An oscillating fan work really well as it more closely duplicates outside air movement.
Always acclimate the seedlings gradually. No matter how you start them, in cubes, yogurt containers, or small peat pots, you need to help them adjust to the change. First day, take them outside when the air temperature is around 60 degrees, and do not sit them in direct sun, but instead place in dappled shade or full shade. Leave them for an hour or two, and bring them back inside.
Day 2, repeat day one, only leave them outside longer, say 3-4 hours. Do not rush this project. The process may take a week or two to accomplish. Before you are done the plants need to be able to take a full day in the sun without showing wear and tear such as falling over, looking wilted, or just stressed.
A few years back I purchased a small metal-framed plastic greenhouse that I sit next to my house, under a pergola, and this keeps the sun dappled, yet the house holds heat and helps the plants stay warmed. I bring the plants inside at night until the nights are at least 50 degrees or higher. Then the plants are left outside. If the outside temperature is forecasted to go below 40 degrees, I bring them back inside for the night. I find this works very well; so much so in fact, I have now purchased the second mini greenhouse.
Now when the tomatoes (or other wonderful items!) come into the marketplace, and I see a variety that I "must have," I can purchase it early and keep it save in the little greenhouses. Just remember however, to be sure to water the plants in the greenhouse as often as they need it. They tend to dry out during the acclimation process.
Lastly, pick the right time for planting. Cloudy days with light rain coming in the near future make a perfect time. If the weather is not cooperating, then plant the plants into the garden areas later in the evening when all possibilities of the sun scorching them are past. Make sure the soil is moist, and if you need to remove the pot, slip the plant out, and place it in its new home. Press down around the plant to remove excess air pockets, and water well. I usually continue the watering process on new plants until they are strong and well established.
This same process goes for the plants coming from local greenhouses and nurseries. If these nurserymen have the plants outside, then you usually are fairly safe planting them outside. If you are in doubt ask them when it is safe to plant a particular item.
If you have any questions about gardening please email Mary Strayer at
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Happy gardening.
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