What to do? Top Leaves doscoloring in flowering?

[Dorus]

Hi, what should i do if the top leaves start to discolor 4weeks into flower? I just looked ph, and it is at 6.5 so it might not be ph problems. I use fafard all purpose potting soil mixed with promix hp. And flora trio nute. Could it be the soil mix that is bad?

Last time it did this, i transplanted into bigger pot in new soil in veg, and it worked.

But on the 4th week of flower, i dont think its very good to transplant, anyone have an idea of what i should do? If i wait 1-2more weeks the leaves will turn pale green/yellow :0

Maybe nitrogen deficiency? What do you guys think i should do before its too late.

 

[SPLFreak808]

Post a pic along with your temps/rh/light setup ect.

 

[Dorus]

Post a pic along with your temps/rh/light setup ect.

View attachment 4142505

Temp is usually between 74-90f, mars hydro 400

 

[SPLFreak808]

Not nitrogen, looks like magnesium but its hard to tell without seeing the whole plant.

90f is hot for indoor, having the light too close at this temperature can cause the tops to slowly turn pale.

How are you measuring soil pH?

Are you using tap water and/or cal/mag?

 

[Dorus]

I think it might be zinc deficiency. The upper leaves are affected first, and getting pale green/yellowing. Light is at about 12-18inches and im using tap water, no cal/mag. I put equal part of soil mixed with distilled water to measure ph.

What could it do if i were to transplant? How bad is it this far into flowering? And if it is a zinc deficiency, what could help? Thank you

 

[ANC]

A LOT of zink is used to build the cells of the sexual parts of the flowers.

 

[Tim1987]

Whats your watering schedule look like?
Pot volume / water given?
How often?
Any waste / runoff, when you water? How much?
Does the pot take long to drain?
Cycles?

 

[Punk]

This looks like the early onset of over watering. You mentioned some improvements when transplanting to a larger container with other plants. If your container is getting fully soaked when you water, but it gets totally dry within 2 1/2 - 3 days, forcing you to water by day 3 (or come home to limp plants), than your container is too small for the size plant you're growing. If the plant is being started from seed, roots are particularly vigorous and will need decent space.

In soil, you should only need to water about every 4 days, if it's much more frequent than that, you're either not giving it enough, or the container is too small. It looks like you're pretty good about giving it a consistent feeding(without overkilling it), which is keeping it from looking worse.

 

[Tim1987]

This looks like the early onset of over watering. You mentioned some improvements when transplanting to a larger container with other plants. If your container is getting fully soaked when you water, but it gets totally dry within 2 1/2 - 3 days, forcing you to water by day 3 (or come home to limp plants), than your container is too small for the size plant you're growing. If the plant is being started from seed, roots are particularly vigorous and will need decent space.

In soil, you should only need to water about every 4 days, if it's much more frequent than that, you're either not giving it enough, or the container is too small. It looks like you're pretty good about giving it a consistent feeding(without overkilling it), which is keeping it from looking worse.

Exactly my thoughts as well.

 

[Dorus]

Whats your watering schedule look like?
Pot volume / water given?
How often?
Any waste / runoff, when you water? How much?
Does the pot take long to drain?
Cycles?

The pot size is 10 inch (3gallon i think).
I give water till about 10-15% runoff (i generally give a 2Liter water or a little less) and it takes 6days to dry.

I use a soil mix with peat humus, sphagnum peat moss, perlite, lime, with micro nutrients, mixed with promix hp, which is a mix of sphagnum peat moss, perlite, dolomitic and calcitic limestone for ph adjuster, wetting agent and mycorrhizae, if that can help. I think my soil retain too much water, or maybe i give too much water? Ive read i need to water till 10% runnoff and i try to do this, but dry every 6-7days.

 

[Dorus]

This looks like the early onset of over watering. You mentioned some improvements when transplanting to a larger container with other plants. If your container is getting fully soaked when you water, but it gets totally dry within 2 1/2 - 3 days, forcing you to water by day 3 (or come home to limp plants), than your container is too small for the size plant you're growing. If the plant is being started from seed, roots are particularly vigorous and will need decent space.

In soil, you should only need to water about every 4 days, if it's much more frequent than that, you're either not giving it enough, or the container is too small. It looks like you're pretty good about giving it a consistent feeding(without overkilling it), which is keeping it from looking worse.

wow very interesting i did not know that about pot size :0 if my pot size dry every 6 days what does it means? i use 10 inch (3gallon?) and gives about 2liter or a little less, and i stop when theres is about 10-15% runoff do you think i over water or just bad soil? and what could i do to fix this before its too late? should i flush or transplant, even though on 4th week flower?

 

[Tim1987]

The pot size is 10 inch (3gallon i think).
I give water till about 10-15% runoff (i generally give a 2Liter water or a little less) and it takes 6days to dry.

I use a soil mix with peat humus, sphagnum peat moss, perlite, lime, with micro nutrients, mixed with promix hp, which is a mix of sphagnum peat moss, perlite, dolomitic and calcitic limestone for ph adjuster, wetting agent and mycorrhizae, if that can help. I think my soil retain too much water, or maybe i give too much water? Ive read i need to water till 10% runnoff and i try to do this, but dry every 6-7days.

Yeah. I think so.
I suppose not really much, can do.
Maybe extra drainage next time?
Maybe next watering give a really big drink? To wash a few residuals out?

 

[OldMedUser]

From the pics it looks like older leaves. Low zinc will hit the new and bud growth. Looks more like aging leaves half way through flowering to me. I crush up a couple zinc tablets from the drug store to give my plants. Look for the zinc citrate or even the ones with copper added. Good for the prostate too.

 

[Dorus]

From the pics it looks like older leaves. Low zinc will hit the new and bud growth. Looks more like aging leaves half way through flowering to me. I crush up a couple zinc tablets from the drug store to give my plants. Look for the zinc citrate or even the ones with copper added. Good for the prostate too.

Hey thats cool i didnt knew you could crush supplements tablets to give to your plants. Does it works with other supplements like magnesium, etc? I found liquid zinc supplements, how many mg zinc sulfate should i give? On the bottle it says 2 tsp/=2mg, would this work?

 

[OldMedUser]

Hey thats cool i didnt knew you could crush supplements tablets to give to your plants. Does it works with other supplements like magnesium, etc? I found liquid zinc supplements, how many mg zinc sulfate should i give? On the bottle it says 2 tsp/=2mg, would this work?

That's no good for the plants. I get 50mg chelated zinc gluconate tablets, 2 - 5gal. I grind them to dust in a mortar and pestle and make sure to shake the container they are in well as you water it in. I also have some caps that are 50mg zinc citrate with 2mg copper citrate. I just pull those apart and add it to the water or grind it with other things. The citrate form absorbs better for people but not sure about plants as the chelated ones should work fine and are cheaper.

I also add a couple selenium, iron, B-complex and a couple chrome + vanadium. Did add magnesium citrate but ran out of those. Just a couple times during a grow to make sure they have a little extra. I can't honestly say it makes any difference other than in my head but that works.

 

[OldMedUser]

i use 10 inch (3gallon?)

To get the average diameter of the pots measure the top and bottom diameters and split the difference. I have a bunch that are 10" top and 7" bottom so the average is 7.5". Height being 10" makes them about 2USG.

 

[OldMedUser]

Sorry. 8.5" Average diam. and 2.5gal

Was still on my first cup of coffee when I posted that.