Help bottom leaves turning yellow and burning ----Help

The bottom leaves of my plants have started to turn yellow with burns in some places . Iam currently using J arther bower compost with 6 weeks feed; as base soil under 400w MH bulb on 18/6 cycle. I recently transplanted the plants from their 2 liter pots to 5 gallon/ 20 liter pots on the 18th of Aug. i am also using a home made neem pesticide just as a precaution. can anybody plz tell me whether it is a nutrient burn or mg deficiency or some pest cuz i cant seem to get my head around the problem. i hope the pics help.
 

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[h=3]Multi-Purpose Compost[/h]
Reduced peat compost containing all essential plant nutrients plus trace elements and a wetting agent.
this is the soil ithe plants have been transplated to on 18th . i have not added any nutrient to the plants cuz apparently the soil has 6 weeks feed in it. Previously (in the small pot) the plats were planted in
[h=3]Multi-Purpose Compost with John Innes[/h]
With added John Innes to improve the compost’s water and nutrient retention.
[h=4]Awarded Which Best Buy Multipurpose Compost in January 2012[/h]
  • Sizes: 60L, 50L, 35L, 20L bale, 10L
  • Recommended Uses: Seed sowing, potting, houseplants, containers and hanging baskets.
  • Feeding Recommendation: After 4-6 weeks feed every 7-14 days with J Arthur Bower’s liquid plant food.
  • Advice: Not suitable for lime-hating (ericaceous) plants.
Multi-Purpose with John Innes Material Safety Data Sheet



And were doing fine withour nutes. Please help
 

Jumpstart

Member
Hello - I could not see any lower main stem pics - do you see any purple striping starting at the base of the trunk and working its way up? Also, in advanced Mag deficiently you will see the lower stems of the fan leaves turn color too. A generally lighter color green and lower leaves turning yellow and dying. If you don't see this then it could be nute burn or N starved. Isn't figuring this stuff out tough? :wall:
 
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