Uco,
There is very little work involved in growing pumpkins. In fact, I can remember that in Canada when we composted our pumpkin seeds and later in the year put the composted soil into the garden as fertilizer the pumpkin seeds from the year before would voluntarly pop up and we would have several `free` pumpkin plants. The same goes for zuccini and squash.
As for planting pumpkins in Japan, the method is the same as for kabocha (you can refer to the instructions on the back of a kabocha seed package). I planted mine in late April of this year (the package says to make sure you wait until after the last frost before planting) and there was about 1 or 2 pumpkins per plant. Depending on conditions, you can get more, but if you limit it to 1 or two the pumpkins will be bigger. As for preparing the soil, I have a bit of a garden, so I mix in chicken or cow manure. You can buy it at JA or a home center. Plant the seeds about 3cm deep in the soil.
The pumpkin plants take up a fair bit of space because they grow as a vine-like plant. If you have ever seen melons or watermelons growing in someone`s garden in Japan, they take about the same amount of space. (Out of interest, pumpkins and mellons, watermellons , zuccini and squash all come from the same spieces of plant, but I am sure that you know that because the use the same kanji).
As for watering, I didn`t do anything in particular. The roots of the plant seem to cover a large area just under the surface of the soil, so it seems to be able to get moisture over a large area. Of course, when the seed has just popped through the soil and there are only a couple of leaves, it is more likely to dry out, so make sure it doesn`t dry out.
As I said, the pumpkin plants tend to streach over a large area, so when planting them the package recomends planting them 1 meter apart. If you don`t have much space, you could limit yourself to one plant.
Some of the pumpkins were ready by mid August. In fact, when I wasn`t around, my boyfriend accedently cut the stem of the pumpkin plant with a weed-eater (草刈り機) and I wasn`t actually sure that the pumpkin would survive until October 31st, but sure enough, I kept it on a shelf in the kitchen and it survived just fine with out rotting.
I have also saved my seed from this year and I have them on a tray to dry them out. According to a book that I have regarding saving seeds, you should make sure the seed is completely dried out before putting the seeds in a zip-lock bag. You should aim to keep the seeds as dry as possible until planting. The book also recomends putting your seeds in the fridge, but at the very least, make sure they are kept from getting wet. Apparently the seeds if kept dry are good for at least 3 years.
Other than that, there isn`t much more that I can recomend. If you plant has lots of flowers (they are large yellow flowers, by the way) and no fruit, then there is a method to help with the pollination that I have tried. Basically there are male and female flowers on the same plant and you can help pollinate them by using a small paint brush and dusting the female flowers with the pollen from the male flowers. It is best to do it in the early morning before the flower closes up.
These instructions are getting to be a bit too detailed and I don`t want to scare you (no reference to Hallowe`en!), so I will leave it there.
In reality, it should be relatively easy to grow pumpkins as long as you have a bit of space in your garden. Good luck!
|