have you ever noticed a germination help by by companion plants?
I always suspected that hormones could go from one plant to another. For some germinate better when sown tightly, and others activated with companion plant.
for example here is a seedling of Iris orientalis, harvested on the summer of 2017 and sown immediately.
the seed pot has been empty for a whole year, apart from a Viola prionantha that has sown here. I like Viola, but they are not considered wise, because their explosive fruits send the seeds in all the pots!
but I have noticed that when you sow the violet, it is difficult, while the involuntary sowing in the pots of the other plants work quite well.
we can see on the picture that all the seeds of iris in the half of the pot where is the viola prionantha are sprouted in September while the other half remains empty (except for some new seedlings of violets !)
I have already noticed that the germination of the big seed of Coix lacryma-jobi also induces the germination of other recalcitrant seeds. (for hot sprouting)
it has nothing to do, but note that one of the seedlings of Iris orientalis is white. it has really little chlorophyll, do you think it is viable? yet it is one of the most vigorous!
