Uncarina grandidieri

Uncarina grandidieri

Family: Pedaliaceae

Native to Madagascar. It is a multibranched shrub or small pachycaulescent tree that may ultimately attain a height of 3-5 meters and 80 cm girth. The flower resembles a large Petunia in form and is bright yellow with a dark throat, as in the “Black Eyed Susan Vine” and give way to green fruit covered in otherworldly spines. The stems are stout and become thickened with age.

Sowing instructions:

1. Prepare the Seeds

• Optional but helpful: Scarify the seeds lightly by rubbing them with fine sandpaper or nicking the seed coat. This helps water penetrate and speeds up germination.

• Soak the seeds in warm water for 12–24 hours before sowing to soften the outer coat.

 2. Soil Mix

Use a well-draining mix, such as:

• 50% cactus soil or potting mix

• 25% coarse sand or perlite

• 25% pumice or fine gravel

🔍 You can also use a succulent-specific mix amended with extra drainage materials.

3. Sowing the Seeds

• Fill small pots or seed trays with the prepared mix.

• Place seeds on the surface and cover lightly (1–2 mm) with soil or sand — they need light but not full exposure to germinate.

• Mist the surface to moisten evenly.

4. Ideal Conditions for Germination

• Temperature: Warm — 22–28°C (72–82°F) is ideal.

• Humidity: Moderate; cover pots with plastic wrap or a humidity dome, but vent daily to avoid fungal issues.

• Light: Bright indirect light or filtered sun. Avoid intense midday sun on young seedlings.

🕰 Germination time: Usually 2 to 4 weeks, though it can take up to 2 months.

Locality: Amboasary, Madagascar. Harvest: March 2025