Tried everything to germinate these seeds but no success. I got seeds from two different sources so no problem with seed. My climate is typical subtropical. Right now it is monsoon and fall is coming ahead in october. Tried zip lock baggie method as well as soil mix and few other methods. Kept in shade, kept in darkness, soaked in water, nothing working so far. Any tips??
Ps: With seeds as large as cobaea scandens, i never expected they would be difficult to germinate. The only germination problem i ever had was with small seeds.
Cobaea scandes germination
The data bases say they should germinate at 70ºF, but the Tom Clothier one suggests placing the seeds vertically in the medium.
I start these very year in March (indoors). I soak the seeds in hydrogen peroxide & water 1:3 ratio for a few hours, but not more than 12 hours. This will soften the seed coat and helpwith germination. Sow to the recommended depth in a 4" pot. You should have germination within a few days. Keep the medium evenly moist, but not saturated. My vine has just started blooming. It is about 5 feet wide and about 15 feet tall. I didn't have a trellis tall enough, so I think I will put up some mesh above the trellis.