- Soil requirements: Petunia seeds prefer well-draining soil with a pH level between 6.0 and 7.0. The soil should be rich in organic matter to support healthy growth.
- Sunlight needs: Petunias thrive in full sun, requiring at least 6 hours of direct sunlight per day. They can tolerate partial shade but may produce fewer flowers.
- Watering requirements: Petunias need regular watering, especially during dry periods. Water them deeply once a week, ensuring the soil remains moist but not waterlogged. Avoid overhead watering to prevent fungal diseases.
- Planting season: The best time to plant petunia seeds is in the spring after the last frost date. In warmer climates, they can also be planted in the fall.
- Depth and spacing: Sow petunia seeds on the surface of the soil and lightly press them down. Do not cover the seeds with soil as they need light to germinate. Space the seeds about 6 to 12 inches apart, depending on the variety.
- Germination time: Petunia seeds typically germinate within 7 to 14 days under optimal conditions. Maintain a temperature of 70-75°F (21-24°C) for best results.
- Maturity time: Petunias usually reach maturity and start blooming within 10 to 12 weeks after planting.
- Harvesting time: The best time to harvest petunia seeds is in the late summer or early fall when the seed pods have dried and turned brown.
- Harvesting tips: To harvest petunia seeds, carefully cut the dried seed pods from the plant and place them in a paper bag. Allow the pods to dry completely before extracting the seeds. Store the seeds in a cool, dry place in an airtight container for future planting.
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