You can easily cut slits in the fabric to allow your plants to grow up through it. Pick the right time to plant. The soil temperature must reach at least 70 F 21 C before you can plant watermelon seeds. Start them about two weeks before the last frost date and plant them two weeks after the last frost date. Part 2. Create hills in the soil. Hills or mounds tend to drain better and warm faster than flat soil, which is ideal for watermelons.
Using a rake or shovel, form the soil in the bed into hills that are 1 foot 30 cm high and 3 feet 91 cm in diameter. Space the hills 6. Sow the seeds. Plant nine watermelon seeds in each hill. Plant the seeds in groups of three. Space the seed groups out evenly around the hill so the clusters are about a foot 30 cm apart. Add a layer of mulch. Mulch is good for watermelons because it keeps the soil warm, retains moisture, and keeps weeds and pests out.
Once the seeds have been planted, cover the hills with leaves, straw, black plastic mulch, or black landscaping fabric. If you live in a cooler climate, black plastic mulch or landscaping fabric will help keep the soil warmest as the watermelon seeds grow.
Water each week while the plants grow. While watermelon plants are in the initial growing stages, they need plenty of water. Make sure they get 1 to 2 inches 2. Only water the plants during dry spells when there's no rain. Make sure that the plants do get watered once a week, either through rain or irrigation. Part 3. Choose a box to grow the watermelon in. Growing square watermelons is as easy as placing a young fruit into a square box. As the watermelon grows, it will grow into the box and grow in the shape of a cube.
The mold must allow sunlight and air to pass through. Glass and acrylic boxes are ideal because they allow sunlight to pass through.
You can find special molds designed to grow watermelons, which are available from internet-suppliers. You can also use a wooden or metal box with lots of holes in it. Alternatively, you can make your own mold from wood, metal, or another material. If you're stuck for molds, you can also use a concrete or cinder block for the mold, but this will not yield a perfectly square watermelon.
Pick a healthy watermelon from the vine. When the watermelon fruit is still young and about the size of a softball, choose a healthy specimen to grow into a square. Look for fruit with no bruises, blemishes, holes, or insect damage. You should also look for a round fruit since this will likely grow more evenly.
We sell the mold used to make both the Box and Heart Shaped watermelon at Melonmold. Anyone who spends 60 or more dollars for something you cannot eat is insane! If you want to throw your money away, send it my way! Too many people. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Comments Louise says:.
How cool is that: Thanks for sharing, Watermelon guy!!! The Watermelon Guy says:. Sydni says:. Tony Da Tiger says:. These brackets should fit perfectly on two edges of the box; use those sides for attachment. Cut a hole 25mm in diameter through the centre of the last piece of polycarbonate, and attach the same way as the bottom. Push the baby melon into this box through the little hole.
When the fruit is fully grown, cut it off the vine, unscrew the polycarbonate lid on the top and enjoy. You can use this method with peat or potting soil to start seeds indoors. Seedless varieties must be planted alongside seed producing varieties in order to pollinate and set the fruit.
Hills for single transplants are spaced 2 to 3 feet apart while double transplants are spaced 4 to 5 feet apart. Rows are spaced 7 to 10 feet apart. How to tell when your watermelon is ripe Use black plastic to cover the hills and rows and plant through the plastic. Drip irrigation is sometimes used sparingly in cooler climates. Use a combination of the following indicators to determine when your watermelons are ripe: 1.
Many watermelons do not emit the proverbial "dull thud"when ripe. For these, the dull thud may indicate an over-ripe, mushy melon. The above indicators for choosing a ripe watermelon are therefore much more reliable than "thumping" the melon with a knuckle. Source: University of Illinois Extension Service. Funny to think that I posted this idea but for cubicumbers on the Halfbakery 16 years back. Perhaps in Japan?
Reply 5 years ago. I can see it now- instead of a watermelon, grow a pumpkin in a cube shape. Then, carve a Domo-Kun face on it. Domo-Kun Jack-O-Lantern. I've got dibs on the 'ible. Reply 11 years ago on Introduction.
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