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Don Juan climbers
The first blooms of the season of my Don Juans have an etherial
fragrance in the morning. But my noon it vanishes. All the following floweres never have any fragrance. I live in Southern Calif. The roses get the correct amounts of fertilizer, light and water. Anybody got the same problem? |
#2
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Don Juan climbers
Mark Preston wrote:
The first blooms of the season of my Don Juans have an etherial fragrance in the morning. But my noon it vanishes. All the following floweres never have any fragrance. I live in Southern Calif. The roses get the correct amounts of fertilizer, light and water. Anybody got the same problem? Here in semi-coastal Northern California, this is a phenomenon I see only on our occasional hot days. Perhaps in your SoCal climate, the hot dry afternoons dry up the volatile essential oils in the blossom and therefore the fragrance disappears as the day heats up? After all, fragrance of a rose can only be sensed if the volatile essential oils are air-borne, but the different oils have different molecular weights and volatility and some may be lost sooner if there is too much heat or wind or lack of moisture in the air? I have been told that a warm, humid, bright and still morning can produce the best conditions to enjoy the fragrance of a well nourished and watered fragrant rose, and I do find this to be so around here. We rarely have much humidity around here, but morning is the most humid part of any day all the same. Also, mornings tend to be not too windy and wind always picks up in the late afternoon, and in some seasons it is more than in others. Anyway, that would be my hypothesis to explain what you are observing. -- Radika California USDA 9 / Sunset 15 |
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