Answer: This is a common problem. People bury huge amounts of organic matter like stumps, forgetting (or ignoring) the fact that as this organic matter decomposes, the area will collapse. You could plant pumpkins or squash, but that wouldn't help much during the winter. If the area stays moist year round, you might consider planting an area of moisture-loving shrubs like pussy willow and red twig dogwood. Birds would love the new habitat and the shrubby growth would hide the hole. These shrubs are deciduous, but would provide some screening. If you want more complete screening, opt for evergreens.
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