Row covers are often applied three to four weeks before crops are normally planted to encourage growth enhancement or for frost prevention. Row covers must be removed at bloom for fruiting crops to encourage bee or wind pollination. Higher temperature later in the season may reduce quality for cool-season crops, necessitating the removal of the row covers. Extremely high temperatures that develop later in the season under row covers can also reduce production of crops like tomatoes and peppers.
Above words are cited from George W. Dickerson's essay in October 2004
Some pictures for reference:
(Pictures are from gardeners.com)
Now, you know so much things about row cover, wanna try? It will certainly help with your cultivation. Just go for it!
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