Plant it to grow Stone Block. From the modern stone age! A very fast-growing seed that only grows under the harvest moon. When harvested the trees have an increased chance of dropping a Harmony Mooncake.
Stone Block Seed price in Growtopia: sells for about 200/WL, buyers pay about 200/WL (median of 2 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: ODCS