Oleanders are frost-tender; hard freezes in the low 20s (°F) can kill top growth. The only remedy is patience: wait for warm weather and watch for bud break.
Once new buds appear, cut each stem back to a healthy, outward-facing bud. Recovery time is unpredictable but growth rate should match pre-freeze vigor. With over 100 plants, a staggered recovery is likely.
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