Cryptostegia grandiflora, commonly known as purple rubber vine, is a fast-growing, tropical climber with beautiful purple flowers. Germinating its seeds can be fairly straightforward with the right approach. Here are some short germination tips for Cryptostegia grandiflora seeds:
1. Soak Seeds
Soak the seeds in warm water for 12–24 hours before planting. This helps soften the hard seed coat and improves water absorption, speeding up germination.
2. Warm Germination Conditions
Cryptostegia seeds prefer warmth to germinate. Aim for a temperature range of 25–30°C (77–86°F) for optimal conditions.
3. Use a Well-Draining Medium
Plant the seeds in a well-draining seed-starting mix, such as a blend of peat and perlite, to prevent waterlogging.
4. Lightly Press the Seeds
Sow the seeds on the surface of the soil and lightly press them down. They need light to germinate, so don’t cover them with soil.
5. Keep Moist but Not Waterlogged
Mist the surface regularly to maintain consistent moisture without over-saturating the soil, which can lead to rot.