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Most boulders are sold at rock yards and Gainesville landscape supply yards by their weight. You can go and pick out the boulders you want, and the rock yard staff will load them onto a pallet to weigh them.
Very dense boulders like granite will therefore likely cost more than same-size honeycomb boulders that have a lot of holes and weigh much less. The cost will vary widely depending upon the type of rock you get, but you can expect to pay anywhere from $100 to $200 per ton and up.
Most rock yards will deliver boulders to your home; inquire about the delivery fee and minimum purchases before you buy. Think through how you will get the boulders in place after they are delivered. Smaller boulders can be moved by one or two strong adults, while larger ones will require either a rock dolly or machinery like a front-end loader to move. Machinery can be rented by the day.
Finally, guard your back when moving these giant rocks in place. Wear gloves and bend your knees when picking up smaller ones, and try rolling larger ones into place to avoid back strain. When in doubt, use machinery or call in a friend or four to help out — there is nothing that dampens a good garden project like pulled and achy muscles.
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Bordering water features.You can't beat the impact of boulders for water features that are intended to look very organic and natural. These rocks are often mortared around the edges of ponds as well as used to create waterfalls or rock walls on the edges of swimming pools.
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Boulders can be mortared together or dry set, stacked or nestled without mortar. Many times it's the sheer weight of the boulder that keeps it in place.
When creating a retaining wall of any kind, remember to include weep holes, so moisture or rainwater can escape. You can do this by adding a smaller-diameter PVC pipe in between the rocks to act as a drain.
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Use natural plantings, like ornamental grasses and flowering perennials, around erosion-controlling boulders to create an organic look.
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Build a patio around a giant one, add a grouping in your landscape bed or use a large, flat one for kids to scramble over and play on. Use boulders in artful ways as well — stack them to create a tower, make garden sculptures or add house numbers to a large one in your front yard.
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Look for boulders that are around 1 to 2 feet in diameter and have a somewhat chunky appearance, then line them up end to end to set your beds apart in a bold and dramatic way.
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