Answer: It sometimes takes patience to trap groundhogs. You might need to reposition the trap if they have changed their daily route through the area and of course you need to maintain a fresh supply of bait in the trap. However, groundhogs can be very nasty creatures and as a result are quite dangerous. You might wish to consult with a local professional rather than trap them yourself.
With regard to your marigolds, keep in mind there are many "home remedies" for deterring or repelling various animals, but in the long run a fence is usually the most reliable solution. A very sturdy wire mesh fence run both above and below ground will keep woodchucks (and bunnies!) out of the vegetable garden.
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