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No. Rock salt and similar concoctions use sodium chloride. It may be great sprinkled on your roasted potatoes, but plants don’t like it at all and in large amounts it will poison the soil. So while standard salt will dry out a tree, it will kill everything else nearby and cause other problems. The confusion is due to the word “salt” being an old catch-term for any dry chemical mixture.

A tree can grow back from its stump, but full regrowth is unlikely (especially for more stubborn conifer trees). Instead, trees are more likely to send up a number of shoots from the dead stump, which will try to develop into primary stems over time. In other words, it will start to look increasingly bushy. The goal of killing and drying out a tree stump is to prevent that from happening, as well as make the stump easier to completely remove.

The most common alternative is burning the stump first, then dealing with the cinders and ashes. As you can imagine, this option creates fire hazards, especially since roots can burn underground, hidden, for long afterward. That’s why many states and cities have outlawed the use of stump burning entirely. We do not recommend this option as a viable alternative unless you get a permit from the local fire department and practice all safe burning procedures.

Others prefer a more long-term DIY approach of degrading the stump with home mixtures like Epsom salt and vinegar injected directly into it. This may help the stump decay faster, allowing homeowners to dig it out themselves, but it’s still a lengthy process. It usually takes months for a stump to start falling apart with such treatments, and in the meantime, it can be vulnerable to rot, insects, and other problems.

Whether tree roots will regrow after the tree has been cut down depends on the species. Some eventually tree roots die, as they lack photosynthesis; however, others can resprout from the roots and even produce new growth for up to seven years or more, if they belong to a species that reproduces through root sprouts.