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Hardiness Zone: 6a
Kathy from Bloomington, IN
Since your tulips are coming up year after year but are failing to bloom, they are either not getting enough sun, or you're removing last season's foliage before it is naturally dying back. Is your lavender bush providing them with too much shade? Tulips prefer full sun, so I would recommend moving them to a sunnier location in the fall or after the foliage has fully died back. When you plant them in a new site, make sure you plant them at the correct depth in nutrient-rich soil with plenty of drainage.