Zinnias typically bloom about 60 to 80 days (around 2 months) after planting seeds. The blooming season for zinnias generally starts in early to mid-summer and continues until the first frost. For example, in many zones, you can expect your first flowers from mid to late July if planting in spring. Zinnias bloom continuously all summer and into fall until frost kills them off. To summarize:
- Zinnias bloom about 2 months after planting seeds.
- Blooming season spans from early/mid-summer (July) until the first frost.
- Continuous blooms are possible through summer if planted in intervals every 2-3 weeks.
- They prefer warm temperatures (soil around 70ºF) and full sun for optimal blooming.
This means if you plant zinnia seeds after the last frost in your area (late spring), you can expect blooms starting in mid-summer and lasting until the first frost in autumn.
