Clipping the Leaves
No photos here. Just a discussion. I've noticed that when the leaves are clipped, the stalk becomes thicker, the roots become more robust, and the color of the leaf becomes a darker green, suggesting an increase in chlorophyll.
I read through a number of articles on plant response to insect herbivorous damage. It seems that leaf damage (being eaten or clipped) sends a chemical message to the roots to increase their alkaloid (nicotine, etc.) production. This might account for the increase in the root structure. I suppose that the decreased leaf area signals the lamina to produce more chlorophyll. I'm not sure what specifically accounts for the thickening of the stalk.
While BigBonner has observed these effects from routine clipping to keep the plants roughly the same size and not shade each other--a significant issue when the transplanting will be automated, it really seems to be of benefit to the home grower raising a few hundred plants.
Last year, when the plants outgrew my 72-cell trays, I transplanted them into 3" pots, until they were ready to go into the ground. By comparison, the clipped plants from this year, still in their 48-cell trays, are hardier and appear healthier than last years re-potted plants. The clipping, which I performed with a pair of scissors, seems time consuming. But compared to the cost and time required to manually transplant them to a temporary, larger pot, the clipping is definitely the way to go. It's cheaper, requires less work, and results in healthier plants with a nice root ball.
Yesterday, I checked the 10-day weather forecast one last time, then went ahead and put my first wave into the ground (11 varieties: 44 plants). Each area is now covered with floating layer of Agribon-AG15 (anchored with strategically placed rocks), to minimize the weeds, bugs, evil rains and curious birds. The second wave (14 varieties) will likely go in next weekend, then the final wave a week after that.
I've gotten nothing from Sweet Oronoko, Big White Burley KY16, Celikhan and CT49. Only two itsy bitsy seedlings of Long Red have managed to germinate. So I'll have a bit of room to place a few of the sturdy extras and strays.
Right now, the planted beds look like bed sheets on the ground.
Bob