is this the start of nute burn,

the fall guy

the fall guy

Member
Get on all, i have three plants which are all the church, the one shown in pics below has started getting brown edges and tips of leaves, i have cross referenced alot of info and i THINK i have narrowed it down to nute burn, or slight calcium defficiency. The lights were flipped to 12/12 5 days ago and i flushed them all with ph adjusted water and started the feed change to bloom with about 3/4 strength solution the day after flush, the plant is 5 weeks old from the day i planted the seed in a canna pre mix soil, i keep them in a dual spectrum environment 400w mh and 400w hps side by side, they are rotated often, ventilation is excelent with a good amount of neg presure on tent walls, temperature stays around 82 degrees at tops of plants, i have also raised lights a bit due to rapid growth............ Please comment on what you think this is as i would like to nip any problems in the bud, ha boom boom, but seriously folks.......cheeeeeeers

p.s plants are about27 inches tall and in 3 gallon pots.
leaf 1.jpeg
nute burn?
plant 1.jpeg
general appearance of plant
plant top.jpeg
overview
 
Kriegs

Kriegs

Well-Known Member
What you're seeing is the onset of nitrogen deficiency. A few days post 12/12 is too early for bloom nutes, no matter what the bottle tells you. Your plants are going into a phase where they're going to be adding way more vegetation than bud (the "stretch"), and they need N to do this. Vegging forumlas are more appropriate for the first 4 weeks or so of 12/12.

Go back to your vegging forumula that got you this far. Start the bloom nutes when the stretch levels off. The level-off is the signal that the plant is shifting its focus completely to flower development. Measure your daily growth and you'll notice when this is happening. It's fairly time-compressed: one day you're putting on 2-4" a day; all of a sudden it's 3/4" (the actual numbers will be strain-dependent, but the dropoff in height addition is sharp).

Now, in all likelihood, someone will jump on here and excoriate me for that advice. Don't listen to them; it's just people entranced with nutrient marketing hype. This is plant fundamentals 101: vegetative growth = N demand. Stretch = massive veg growth. It's that simple.

Good luck. Your plants look great; sounds like you have a very nice setup. This is not a "problem" per se, but just a little course correction.
 
the fall guy

the fall guy

Member
Kriegs said:
What you're seeing is the onset of nitrogen deficiency. A few days post 12/12 is too early for bloom nutes, no matter what the bottle tells you. Your plants are going into a phase where they're going to be adding way more vegetation than bud (the "stretch"), and they need N to do this. Vegging forumlas are more appropriate for the first 4 weeks or so of 12/12.

Go back to your vegging forumula that got you this far. Start the bloom nutes when the stretch levels off. The level-off is the signal that the plant is shifting its focus completely to flower development. Measure your daily growth and you'll notice when this is happening. It's fairly time-compressed: one day you're putting on 2-4" a day; all of a sudden it's 3/4" (the actual numbers will be strain-dependent, but the dropoff in height addition is sharp).

Now, in all likelihood, someone will jump on here and excoriate me for that advice. Don't listen to them; it's just people entranced with nutrient marketing hype. This is plant fundamentals 101: vegetative growth = N demand. Stretch = massive veg growth. It's that simple.

Good luck. Your plants look great; sounds like you have a very nice setup. This is not a "problem" per se, but just a little course correction.
Click to expand...
Excelent, thankyou Krieg i shall do exactly that, standard veg nutes until the flowering stretch slows sounds like good old common sense, and the symptoms showed up just after the nutes change, it all fits , next watering/feeding ill stick with canna terra vega at 1.4 ec (my aged water has a 0.2 ec) resulting in the required 1.2ec level which has got me this far, thanks again, cheeeeeers
 
Kriegs

Kriegs

Well-Known Member
the fall guy said:
Excelent, thankyou Krieg i shall do exactly that, standard veg nutes until the flowering stretch slows sounds like good old common sense, and the symptoms showed up just after the nutes change, it all fits , next watering/feeding ill stick with canna terra vega at 1.4 ec (my aged water has a 0.2 ec) resulting in the required 1.2ec level which has got me this far, thanks again, cheeeeeers
Click to expand...
Your welcome . As they grow up, they may demand more veg nute than in the past.. just something to keep in mind. Keep an eye on your bottommost leaves - they should stay green throughout stretch with the light power you have.

Good luck - I'm sure they'll turn out great. :eyesmoke:
 
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