the early establishment period. Once plants become larger and birds become familiar with the shells, the effect may decrease.
4. Use Them Around Cabbage and Other Brassicas
One of the most interesting traditional uses for hanging white eggshells involves cabbage white butterflies.
Some gardeners hang white shell halves around cabbage, broccoli, kale, cauliflower, and Brussels sprouts.
Why?
The traditional theory is that the white shells resemble cabbage white butterflies. An approaching butterfly may supposedly interpret the white object as another butterfly already occupying the plant and look for another place
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