Japanese Magnolia trees are perhaps, the earliest and most spectacular, flowering trees, some years blooming even unpredictably in December during an 'Indian Summer' warm up. This early appearance of flowering may be prevented or delayed by continuous cold temperature environments.
When the Japanese Magnolias bloom too early, during winter, and are followed by a hard freeze, the flowers will freeze too, but secondary buds will usually re-bloom later, as the weather begins to warm up again. Japanese magnolia flowers range in size from medium to as large as a dinner plate, and blooms will cover the complete color spectrum of red, yellow and white. The most common colors are purple and pink.