Hi Luc
I am quite an expert at killing off seedlings of this plant. I have one 30cm x 30 cm plant from a batch of seeds I got from you a few years back. All the others grew to about 3 cm and died. For the next couple of years I would get the same thing, all of seeds would sprout, grow to about 3 cm and die off. I tried to verythind, sun, shade rainwater, tap water, lots of water, little water, all sorts of soil mixes... nothing seemed to work. With my last batch I sprouted them in pure coco coir and kept them almost bone dry. Finally I have had success. I was able to get them past that delicate stage and repot them into a regular soil mix. I still keep them on the dry side, and only water them from the bottom as I find them succeptable to root rot. From my first success it seems that once they get 5-10 cm tall they are pretty hardy.
Any idea on how long it takes for them to fruit?
Hope this helps,
Richard