- Soil requirements: Petunias 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 them with soil as they need light to germinate. Space the seeds about 6 to 12 inches apart to allow for proper air circulation and growth.
- Germination time: Petunia seeds typically germinate within 7 to 14 days under optimal conditions. Maintain a temperature of 70-75°F (21-24°C) and keep the soil consistently moist during this period.
- 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 collect petunia seeds, wait until the seed pods are fully dry. Gently break open the pods and collect the tiny seeds. Store the seeds in a cool, dry place in an airtight container. Label the container with the date and variety for future reference.
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