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Impact of Daylight Hours on Rose Growth

12 years ago

As I was looking out the window this morning at all of the new growth on the roses, and pondering the temperature (32 again this morning), I was wondering about the impact of day length on rose growth. I have friends who live in Hawaii where the length of the day doesn't change from summer to winter, and we have discussed at length the difficulty of growing a lot of vegetables and the issue of day-neutrality.

So, I'm wondering if anyone has information on the relative importance of the increase in daylight hours on the growth of the roses. Are there day-neutral roses the same way there are some day-neutral onions, for example?

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