I've written about the use of row covers before but I continue to get questions about it.
Most often...Does it really work?
The answer? Yes!
This year my row was too long to cover it all with row cover. Part of the row was not covered. It was a good test.
And the results of the test?
Savoy cabbage under row cover.
Cabbage without row cover.
Cauliflower under row cover.
Cauliflower without row cover.
After over ten years of using row covers, I'm convinced. As long as I cover the cabbage/broccoli/cauliflower plants as soon as I plant them. The little white butterflies cannot get to the plants to lay their eggs. The result is NO green worms!
Now that the weather is colder and no butterflies are around, I can remove the row cover. One piece is now covering my cold frame to hopefully give us some late lettuce and spinach.
Learn more about types of row covers.
Edit to add: In the link above, I shared a US supplier of the row cover I use. Their website link no longer works so maybe they are not in business. I can't seem to find a US supplier for this type of woven row cover. Here is an Austrailian supplier. You can find row covers at your local garden center or mail order seed catalog but they are not as sturdy as this kind of row cover and will probably need replaced in a year or two. But they still do a good job in keeping out bugs! If anyone finds a US supplier for the heavier row covers - please let me know!