When I began vegging these clones under a single air-cooled 600W HPS the distance between the bulb and plant tops was 45inches.

Over the course of time I lowered the lighting system to where it is now. Only 11inches from the tallest plant tops.

The G13 strains stand @ 6", 5", and 4" in height. There are internodes at every inch on all three.

Now we come to the stragglers of the group. These Big Bud are very slow but are showing signs of health. They stand @ 2 1/2", 2" and 1 1/2" in height. The tallest actually has 4 or 5 internodes which is quite good for a tiny plant. I'm still contemplating what to do with them when the time comes for me to turn the lights down.

Today all pots appear to be of the same dryness, (i could really do with a soil moisture meter). I will be checking the pH of my pre-mixed solution, correcting any imbalances, then giving them all 1L. The remaining solution @ EC1.0 will them be discarder and replaced with pH'd water. The next application will be plain water. Hopefully I will them be able to repot the bigger plants and allow them to veg for a couple to three weeks after their flush.

pic1 - G13 @ 6"
pic2 - G13 @ 5"
pic3 - G13 @ 4"
pic4 - Big Bud (i guess?) @ 2 1/2" after having decaying leaves removed a few days ago