Glass Jars for Frost Protection

by NorthernHomestead
To protect plants with jars or glass cloches is very old-fashioned. Glass jars are thicker than plastic or frost blankets and give more protection. Under the glass jar a micro climate is created, and if the weather gets warmer it starts to build up condense and rains in there – a fun thing to watch.
Choose a jar big enough for your plant to grow in. Leave the jar on all day, except for hot days. If you remove the jar during the day make sure to put the it back on the plant before it is getting cold at night, so warm air is trapped in the jar. On very cold nights it is easy to give the jars a second layer of frost protection.
May 28th the zucchini plant is growing :). This works!
Our last frost day is end of May. On May 9th I planted a zucchini seed under a jar.
Want more details about this and other DIY projects? Check out my blog post!
Frequently asked questions
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  1 question
  • Catty Phillippe Catty Phillippe on Aug 08, 2017
    Now i know why i save so many jars. Will it keep slugs and whatever that like to eat seedlings, grom getting to them?

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  • Cuky Cruz Cuky Cruz on May 22, 2020

    I just planted a lemon, orange and many other plants, what else can I do come winter. But I like your idea for the little ones

  • Steven Steven on May 27, 2020

    Cult, wrap your trees in bubble wrap!