幫你搜了一下.

1. Some roses change colors at different times of the year or during different weather between seasons. This is "typical of the variety". Hot Cocoa can be burgundy-brown in cooler weather, hot orange in hot weather.
2. Roses can "sport" or mutate. Sports can be color changes or growth habits (climbing sports or repeat-blooming sports). Pink Knock Out and Blushing Knock Out are color sports of original Knock Out. Sometimes, though, the sport can revert back to the parent color. I have seen Pink KO and Blushing KO plants with blooms that are bi-colored or back to KO's cherry red.
3. Rootstock suckering. Most roses sold in the US are grafted onto another rootstock. Most of those are grafted onto the rose Dr. Huey, which is a once-blooming red climber. You can tell rootstock from the desired variety by digging down to find the source of the canes with the different colored blooms. These will come from below the graft union. Dr. Huey's canes are usually thinner than the grafted varieties canes. You can dig down and tear (not cut, tear) out those canes and try to save the grafted variety. Dr. Huey is a vigorous grower, and if its canes are not removed, the plant will eventually be all Dr. Huey.

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• 哦，多謝了！ -紅袖添香老板娘- ♀ (0 bytes) () 06/13/2011 postreply 13:06:18