Answer: Unfortunately, pines do lose their lower branches as they age, so the gap will also increase over time. The pines are very strong competitors for light, moisture and nutrients and tend to acidify the soil around themselves by shedding their needles. In this situation it may be very difficult to establish anything directly under them. Instead, you might consider a fence or a line of shrubs next to them. Some shrubs frequently suggested for windy spots are the old fashioned hardy favorites such as ordinary purple lilac, forsythia and so on. These are also sturdy plants and might have a chance to establish themselves next to the trees.
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