Classicfur,
I think a large % of berres that just fall to the ground are not going to make it. Scott's 1% estimate is probably about right.
This year it has been hot and dry for most of our seng digging season which opened Aug 15 and as early as first week in September I saw plants that were dropping berries already and all of those berries were just shriviling up and drying out. We have had almost no rain here for 3-4 weeks. I expect that nearly all of the berries that just fell off this year here in Middle TN are just going to dry up and die.
I expect that the large majority of natural reproduction success in ginseng happens from those few plants that keep the berries on longer and drop them just before heavy leaf fall and rainy weather (much later in the season than most). You know occasionally in October you still find a few plants with red berries. I think those are the ones that have the best change of surviving when the berries just fall off naturally. Reason is they soon get covered with leaves and it often rains more mid-late October than it does in September.
Not sure if you were posting on the board back earlier in the year when we were discussing season opening dates and green berries but I did find online a nice article where a detailed study was done on germinatin rates - by planting date and berry color.
Below are a few details from that article:
On August 1, August 26, and September 22, 1998, ginseng berries, randomly selected from those available at each
date, were collected from the 20 reproductive adult plants in the population. Because they were randomly chosen, the frequency of green and red fruits at each date reflected the natural frequency occurring at that time. On August 1, all berries were green, on August 26 there was a mixture of red and green fruits, and by Sept. 22, all fruits were red. Seeds were planted 1 cm deep within paper ?nut cups? (to prevent seed migration) in native soil.
And below is a chart that summed up the germination by date/color.
Aug 1 is obviously way to early to be collecting berries and planting them but a small % of green berries planted on Aug 1 did germinate.
If you read the full article it did say that 50% of green berries planted on Aug 26 germinated. Also notice that by berry color just slightly more than 50% of all the red berries germinated. So a Green Berry that is planted at the end of August, First of September has about the same change of making it a s Red Berrie does.
It is intersting that a higher % of berries from the Aug 26 planting (mix of red & green berries) germinated than did from the Sept 22 planting (all red berries).
If they had eliminated the Aug 1 planting from the test then there would have been very little difference in the germination rates by berry color.
And here is the link to the full article:
www.as.wvu.edu/biology/faculty/JBMPerson...005BerryRipening.pdf
PS - I will sure be planting some red ripe berries here on my place after my seed producing bed starts paying off and will gladly do some test plot plantings with a measured # of berries and report back the results.
TNhunter