Morrowind with Advanced Herbalism: When to harvest which plant

I've started a new game of morrowind recently, and added the "Advanced Herbalism" Mod. Supposedly, plants I harvest should have a chance to drop seeds if harvested during the right moon phase - I found the almanac that tells me which phases the moons are in, but no information regarding which phases I should be looking for.

Is there any ingame book listing the best moon phases to harvest plants if I want seeds or can someone tell me whether plants only drop seeds during those moon phases or whether that merely increases my chances?

Since there's no answers yet and I've just gotten my first couple seeds, I'll use this space to post what I've found.

I got several seeds of the same plant, after no seeds from that plant before, and none of the other plants I happened to harvest on the same day gave seeds. So I guess it's safe to say that the moon phases DO matter, and plants have different phases to harvest seeds in.

Plant seeds and the moon phases I got them in according to the herbalist's Almanac (will add more as I find them):

violet coprinus spores: both secunda and masser at cressend (sic) moon