outdoor soil growing problems

Hello, I'm looking for advice on symptoms troubling my plants. I've never used an on-line forum before, so bear with me. I will list the details first, and attach pix.

Symptoms:
A. Browing/spotting on edge of leaves, increasing from tip to base.
B. Starting with lower leaves, moving up to higher nodes.
C. Leads to drooping.
D. May be affecting neighboring Chrysanthemum and Peppers.

Details:
1. Outdoor
2. Soil
3. Germinated in "Foxfarm Light Warrior Seed Starter"
4. Transferred to 4" pots in "Sun Gro Sunrise Organic Potting Soil" (3.8 compressed bale)
5. Several strains (White Widow, Big Bud, Carnival, Shanti from seedbanks in NL; a naturalized line grown in US for 7+ years, originall Citral from NL)
6. 30-40 days old (4-6" tall, at 6th - 8th nodes)
7. water once per day in evening; generally let soil dry before watering
8. Feeding with "Foxfarm Grow Big" diluted in filtered water, starting daily; cutting down to every other, mixing with tap water as well.
9. No bugs
10. Plenty of sun, not much rain, mixed humidity.
11. In full sun from ca. 11 - 18:00
12. Have gone 2-3 days no nutritional feeding.
13 Have pruned partial, affected tip of leaf; still spreads.
14. Have pruned full leaf (see pix B & E).

More pix available upon request.