|3 Burning bushes in a row. All get full sun. One turns it's fall color, the other 2 don't. They were all planted at the same time and have been planted for 3 years. The first one has not grown much and has no fall color. The middle one has grown the most of the 3 but has no color. The third one in the row has grown some and has nice fall color. They are not planted under an overhang so I don't think it's too much water from a clogged eve. The perennials plnated around them seem to do fine. They are planted in iowa in black loam. Any suggestions? thank you.
|Answer from NGA
November 19, 2002
|This is a bit mystifying. The most common reason for lack of fall coloring is that the plant is growing in too much shade, but these are in full sun. There can be some genetic variation between plants that would account for the difference if they were seedling grown. The difference is size is most likely due to how well the plants have managed to establish their roots. The small one most likely is not rooting as well as the other two. Again, however, there can also be some genetic variation in growth rates. I'm sorry I can't give you a more specific answer.
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