Does Japanese Black Pine need a winter dormancy?

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Does Japanese Black Pine need a winter dormancy?

Post  Chiang Cheng Kooi on Mon Oct 24, 2011 4:55 am

I have been growing Japanese black pine in tropical Malaysia for about two years, I wonder if they will do well in the future because climate here cannot provide a winter dormancy. My question in does JBP need a winter dormancy.

Chiang Cheng Kooi
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Re: Does Japanese Black Pine need a winter dormancy?

Post  mbolos on Mon Oct 24, 2011 6:30 am

As I've always known it, they do. In the reading I've done, it seems that trees that require dormancy can survive with as little as 1000 hours of below 50 degrees Fahrenheit (if I recall correctly). I've also read that trees that need dormancy and are not allowed it may survive for a few years, but then get over-stressed and eventually die.

mbolos
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Re: Does Japanese Black Pine need a winter dormancy?

Post  Khaimraj Seepersad on Mon Oct 24, 2011 10:01 am

Chiang Cheng Kooi,

about 20 years later, and from seed [ Japan, a gift pack posted to me,] I would say no. Additionally, a German guy also told me that the Japanese Black Pine grows all the way down onto the beach in Japan. You may wish to check and see if the Japanese Black Black wasn't originally a Chinese Black Pine and if it came from the coastal area of South China.

What may give you problems is translating the training information from Japan to tropical conditions and responses.

I have several pines and every year add on a few more seedlings, just to keep figuring out the training technique.

I live in the Caribbean, and we have a pronounced dry season from January until around May, growing cooler by October until say February[ lowest normal night temperature 19 deg.c and lowest recorded temperature 15 deg.c ]
Daytime is a standard 30 -> 33 deg.c as summer comes on.
Breezy island.

Soil mix is mostly crushed silica sand [ 70 % ] and compost. Testing the use of crushed, porous, eartheware red brick, from our local brick factories. Gives excellent drainage.
Growing containers are simple, peasant made earthenware lowfired red brick round flower pots, up to 16 inches wide [ 41 cm ] and 5 to 6 inches deep [ 12 to 15 cm ]
Placement full sun with a light zephyr.

See if you can contact Leo de Leon [ Manila ] as he is also growing Black pines.

Hope this helps.
Khaimraj

My oldest, and ready for it repotting, every three years.
When I have figured out how to safely shrink the needles, I will apply the information to this tree.

Khaimraj Seepersad
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Re: Does Japanese Black Pine need a winter dormancy?

Post  Chiang Cheng Kooi on Tue Oct 25, 2011 9:13 am

Thanks for the reply

Chiang Cheng Kooi
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Re: Does Japanese Black Pine need a winter dormancy?

Post  Chiang Cheng Kooi on Tue Oct 25, 2011 9:19 am

Khaimraj Seepersad, u got a good point, as Malaysia nursury plant from China, Veitnam or Taiwan, my plant is very likely Chinese Black Pine.


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