I used granulated garlic for a couple of years and decided it did zilch to keep the bugs away. Am thinking of mainly the bad Tick problem we have here.
This year though I switched to fresh garlic after doing some reading about it and while they are still getting a few bugs they certainly are getting less.
We have a couple that aren't getting fed and they can have masses of ticks on them poor things.
I use a $2.00 shop garlic crusher to get the best of the juice out and then just chuck the in with the feed.
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Life isn't about how to survive the storm,
but how to dance in the rain.