One of the advantages to raised beds, in general, is that the raised beds warm up faster than the ground. This makes a big difference for me because I live in northern Minnesota and if I had to wait to grow some plants in ground, then it would be mid-June before I could start my garden.
On a different thread, someone asked me about my experience growing tropical bitter melons in my hügelkultur raised beds. I don't think I would have any success trying to grow bitter melon in the ground where I live. Anyways, here is a little bit of that conversation....
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Yes, there are different kinds of bitter melon. I only know the ones we grew this summer. The ones we grew were pretty darn bitter to my taste.
What I liked, or could tolerate, was some of the bitter melon cut into smaller strips and adding a small portion of it to our soups. In limited quantity, it added a nice little kick to the soup. Fortunately, Dear Wife has a pretty good understanding of what I might like and can dial back the native ingredients so as to not overpower my American taste sensibilities.
Dear Wife prefers to cook up a big mess of bitter melon, stir fry style, with eggs and a bit of pork, salt and pepper to taste. She loves it. It's way too strong for me. She can eat that as a side dish, or even a main dish along with some rice, of course.
Frankly, I was happy to try to grow some of the bitter melon out in our [hügelkultur] raised bed garden for Dear Wife. We live in northern Minnesota zone 3b and the bitter melon we had is considered a tropical fruit. I did not know if I could get anything to grow, but we had a good harvest. Enough, in fact, to share with some of her other Filipina girlfriends. A taste of home halfway around the world for the girls.
Next year, I will be trying to start some bitter melon plants inside the house in late winter, to give additional weeks head start for the plants. Our growing season is just much shorter and cooler than that bitter melon plant would prefer. So, anything I can do to help it might improve the final harvest.
For those not familiar with bitter melon, here are some pictures I took this summer...
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I personally think that the hügelkultur wood, which acts as a giant sponge, helps to keep the moisture level in the soil in the raised bed more consistent. I imagine that the native soil of this tropical plant is plenty wet all growing season. A "normal" raised bed, without all that wood in the bottom, would drain out and dry out fast.
Also, I think the raised beds warm up a good 2 weeks earlier than our ground does. Given a short growing season where I live, 2 or more weeks advantage makes a big difference.