How many days does the sunflower blind box seed bloom?

50-60 days. According to Facai Agricultural Network, it takes about 50-60 days from sowing to flowering of sunflower blind box seeds, and the plants grow rapidly, and will germinate in 2-3 weeks after planting. If you want sunflower to grow vigorously, you need to provide it with an environment with sufficient light. The time to see the light is more than 8 hours every day. When the weather is hot, you should water the sunflower to make the soil moist.