These questions have to do with what time of year it is, your climate (USDA zone), and so on.
Radishes are certainly among the fastest. Problem here in zone 9b-10 is there is only point in planting them from around Sept.-March. Rest of the year
they go to bolt before being worth much.
Lettuces can be fast. I have at least 15 different kinds in my vault and they tend to be either short or long season. I mark the packs in a way and
plant in groups based on this. Here you do things like radishes, carrots, lettuces, brassicas and the like, you plant a new set of each (based on
resources vs. the group) about every 2 weeks during cool season right on through till about now. You end up with perpetual harvest that keeps flowing
in. With the right space you can plant enough lettuce that theres so many young plants you can pull from them without destroying them.
The key with many is to not to completely uproot / chop them down the way you find them at the grocery. Groceies methods dictate total uprooting for
the food to endure the trip and wait to peoples plates.
With things like moringa, that tends to be perennial territory in places like here. I will say that it is so fast growing I believe it could be grown
as a rootcrop in northern climates and you should be able to expect a decent root harvest in a shorter season. Here its grown as the tree it is. A
total perennial guide, now that is a long presentation. One I intend to make real soon detailing my food forest. I must add that perennials are the
way I go for about 2 years now. About 90% of my space is now used for perennials (mostly all edible / useful), hardly mess with annuals anymore.
With odd perennials (like moringa) and other exotics the concept of GMO is irrelevant. GMO so far is mainly only to do with key commercial crop
Finding an accurate list of GMO seeds is no easy task. There's a list that's made some websites:
Tere's items on there I know are supplied by heirloom only
vendors, and when you click in to where that list came from they claim they don't
sell GMO to the consumer garden market.
The problem is seeds aren't labelled one way or the other. And without proper lineages (which no
seed vendors provide) and background
information that would go with such data, genetic purity can never be ensured.
edit on 23-4-2013 by IgnoranceIsntBlisss because: (no reason