Yes, latex balloons are biodegradable. However, it can take 6 months to 4 years for a latex balloon to fully decompose, depending on environmental conditions, including sunlight, oxygen, and microbes.

In a high-heat, active compost, the estimated decomposition time is several months; however, if abandoned in natural conditions (soil or land), it takes 6 months to 4 years for complete decomposition. In marine or saltwater conditions, they decompose much more slowly, sometimes over a year. And it can harm wildlife because animals might mistake them for food or get tangled in the strings. So ensure proper end-of-life disposal.