Your question is complex. In general the seeds from seedless watermelons are not going to work well. Seedless watermelon seeds can be purchased. They are Triploid. Three sets of genes. Basically difficult to grow. But it can be done. When growing you need regular pollen from a normal watermelon to fertilize the seedless variety. They try to form seeds but they mix a triploid with a diploid. Because of this the seeds do not form. Well mostly they do not form. Also the melon around the seed stays firm. Which is good. So you saved some seeds of this triploid diploid mix. What will you get. Who knows. usually nothing because they will try to form seeds that will most likely not grow or form. But with luck who knows what you have and what you will get. It is a long shot. but you might get something. If you get some triploid pollen onto a triploid female you might wind up with seedless triploid watermelon seeds. But it is not suppose to work. Everything is suppose to die. The easy way is to buy known seeds. The experts purposely cross diploids with tetraploids to make triploids. Two triploids are not suppose to work. It is a mess with lots of sterility and death. Part of your problem is that the seeds you have were generated only HALF from Seedless watermelon. The other half of those seeds is regular diploid watermelon seeds. So you dont really have seedless watermelon seeds. You only have half of your seeds come from seedless watermelon genetics. the other half of the seed comes from unknown regular watermelon seeds used to pollenate the seedless plants. I would not bother growing the plants from seedless watermelons. Unless you have lots of acres of land to experiment with.

Thanks folks! Fruitnut - I remember reading something in the Fruit forum that someone (maybe you, or maybe Jellyman?) said that seedless was just another name for tasteless! I'll let you know what they taste like in 5 months or so! Thanks again, Bart

I don't have much issue starting the seedless and this year I planted outdoors in March. That's very early here, 3-4 weeks before average last frost. But with our sun and a black weed barrier overlaid with clear poly they come up in 5-7 days. Star Brite is easier to get up and outgrew anything else including 7-8 seedless cultivars. I think the key to getting seedless up other than warm soil is to get them up without watering again after planting. My system does that. I cut a small hole in the black weed barrier, plant, water well, and cover with the clear poly. Remove or slit the clear as they start to emerge.

"My understanding is if you grow a large field of seedless watermelons you will end up with three types of melons. The normal fruit of the diploid pollinator, the seedless fruit, and a small number of fruit that is different than the other two. This melon contains the seeds for next years seedless planting." Unfortunately, not true. You have to use the breeding lines to create new seeds each year. That is the same with regular hybrids, except that extra steps must be taken to set up the breeding lines.