Answer: Your seedlings shouldn't be planted outdoors until all danger of frost has passed, and the soil has warmed up a bit. If you've planted in the ground and frosty weather threatens, you can cover individual seedlings with a paper cone (hot cap), a plastic milk jug with the bottom cut out, or even an inverted jar. Be sure to remove the protection during the day when the sun comes out to avoid cooking the seedlings. You can protect an entire row of plants with floating row cover material such as Reemay, or even a bedsheet or old blanket. Remove them during the day so your plants get enough light.
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