Once a watermelon starts growing, how long does it take to reach maturity. I’ve got about 5 watermelons that are a little larger than a big grapefruit right now. They are “Sugar Baby” variety, just kinda curious as to when they will be ready? Got to get to planning my watermelon party! :)
Ripe watermelons make a hollow noise when knocked on. Unless you are familiar with the sound, this can be a little difficult to pick up on. The first year I grew watermelons, I knocked on a melon at every farmstand and grocery store that I came upon, just so that I could get a memory for the sound. Then when I thought the melons might be getting ripe, I started knocking on them every day until I could hear a change in the sound.
The days to maturity printed on the seed packet can give some clues as to when to start checking for ripe melons. This is calculated from when the seeds germinate. It is based on the climate of wherever the seeds were grown, so obviously it is not very accurate and is more helpful for comparing varieties than actually predicting harvest. If everything seems to be a little ahead as it is here, then start checking a little early. Size is another clue to maturity; Sugar Baby watermelons are small melons about 11″ diameter I think. I hope this helps…
Thanks for the help Leslie, looks like I’ve still got a few more weeks!
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Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.