Answer: If you're thinking of Viburnum opulus 'Eastern Snowball' (which is hardy to zone 3), it does best in full sun, a slightly acidic pH (6.0), and rich, boggy, humusy soil. However, it is tolerant of a wide range of soil conditions and pH, thus it makes a great plant for our yards. Just make sure you provide consistent, deep moisture for the first couple of years after planting so it will become well established. Enjoy!
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