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No. Unfortunately, leaf removal is your responsibility, no matter what tree the leaves come from. It would be pretty hard to regulate leaves since they can be moved by the wind or water. Imagine the detective skills it would take to determine which tree each leaf came from and who was then liable for removing it. Instead, plan to remove any leaves on your property.

It’s unlikely your leaves are a hazard, especially if you get to them while they’re dry. However, a couple of rare risks exist. University studies suggest that decaying leaves can produce organochlorines, toxic pollutants similar to man-made PCBs (polychlorinated biphenyls), so avoid keeping them in an enclosed area.

Also, leaves and compost may cause the growth of fungi that can cause diseases like histoplasmosis and aspergillosis, as well as mold spores that are unhealthy for human lungs. Again, severe issues are rare, but those with compromised immune systems or allergies to mold should wear face masks when directly handling leaves.

The time it takes for leaves to decompose can range from six months to three years. Key factors influencing the decomposition rate include water, sunlight, and heat, so local weather conditions play a significant role. Decomposition will take longer for thick, matted layers of leaves. To speed up the process, you can mulch the leaves, as smaller pieces break down faster. Spreading large piles into thinner layers to increase exposure to sunlight and water also helps accelerate decomposition.

Your neighbor is not in a good position to know if your trees are truly dead or pose any kind of danger. That’s why hiring an arborist or tree service expert can be such an important part of the process. If the trees are still alive and don’t pose any threat, you’re in the clear (but you may want to document and photograph everything in case events turn sour down the road).

But if a tree is visibly dead and near the property line, you should remove it to be safe. If a dead tree falls on a neighbor’s property, they may have grounds to sue for negligence. If any branches on trees have died, it’s a good idea to cut them back for similar reasons.