Undernuted plants 5th week of bloom

So basically i have understood that my plants have been slightly (and one severly) undernuted throughout bloom thus far. Buds are small, but quite abundent.

What can i do to save the situation? Or is ti too late?

Im using an organic fertilizer with bacteria and all important trace elements. And a chemical orchidé fertilizer with npk 444.

Could i add the full recomended dose of both at once to give my girls the fuel they are so desperately needing? Can i add even more?

Or am i at risk of chocking them by overfeeding?

Im a little at lost as to what to do. All help or pointers would be appreciated.

Forgot to mention, im using soil.

get some bloom ferts and start feeding them that at 1/2 strength every other watering, then in a week or so kick it up to full strength.

pmumbry said:

get some bloom ferts and start feeding them that at 1/2 strength every other watering, then in a week or so kick it up to full strength.

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Thanks for repky. But the problem is that i have been giving them the recomended dose. (this is not cannabis specific nutes though, but locally available multi purpose nutes).

So the question is more; can i go over the recomended dose, and by how much? Could i give full dose of both my nutes at the sae time?

post a pick so we know its really under fertilized if your giving it full doses you may be over fertilizing.

I will try to get new pictures later today. I was told it was probably undernuted bcause leaves were a little pale, and stems were red. Can over-nuting also cause red stems? The worst affected plant also has a lot of leaves that are underdeveloped (only a few leafs, for example 3 on a leafset instead of ~11 on other plants). But i will get some new pictures and get back with it later today when im back home. Thank you.

There's not much you can do now at 5 weeks into flower. You said that you were using an organic and a chemical fertilizer. Have you been adjusting the PH when adding nutrients? Nutrients lower the PH significantly. At even half strength some nutrients will lower the PH to close to 4.0. If you water with that you will lower the PH of the growing medium. People that tell you to add this or that to cure some deficiency will only lead you on a path to increased problems. What you need to do is water with just plain PH adjusted water for a week or more then start at 1/3 to 1/2 strength feedings. But at 5 weeks into flowering if your having issues there isn't much you can do. If they aren't looking awesome by now they are't going to at harvest.

less is more when it comes to nutes.

Small buds might just be genetics.

indiapale said:

There's not much you can do now at 5 weeks into flower. You said that you were using an organic and a chemical fertilizer. Have you been adjusting the PH when adding nutrients? Nutrients lower the PH significantly. At even half strength some nutrients will lower the PH to close to 4.0. If you water with that you will lower the PH of the growing medium. People that tell you to add this or that to cure some deficiency will only lead you on a path to increased problems. What you need to do is water with just plain PH adjusted water for a week or more then start at 1/3 to 1/2 strength feedings. But at 5 weeks into flowering if your having issues there isn't much you can do. If they aren't looking awesome by now they are't going to at harvest.

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Ok. Thank you. That was what i was afraid of. The thing is that, out of 5 plants, only one is showing these severe effects. The stems of the main-stem-fanleafs are dark dark red. The leafs are now all dark green. Some are drooping down like it was over or under watered (buts its not). The fan leafs on this plant have way fewer "fingers" than the leafs on other plants. Still this is the plant that has the most amount of buds (although they are all what i think is called popcorn buds). However there is quite a lot of the. This same plant is also the one that has grown the tallest and has the most branches. The rest of the plants are looking excellent in color now. Little or none red discoloration on leaf stems. But still only small buds. PH is definitely something i will monitor for next grow. Have already bought some ph stripes to at least make an aproximation. But might it be of any benefit to add some PH adjusting liquid from my local plant shop to the nute-water mix or is it pointless at this stage?

The pH in my tap water is around 7,5. The water after adding my nute-mix however is even higher. Somewhere around 8. Or even maybe a little higher. Could this be the problem then? Should i try to lower it? I will also try to measure the water that pours out after watering tonight

mewton said:

The pH in my tap water is around 7,5. The water after adding my nute-mix however is even higher. Somewhere around 8. Or even maybe a little higher. Could this be the problem then? Should i try to lower it? I will also try to measure the water that pours out after watering tonight

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could be part of your trouble. ph it to 6.5 with vinegar

let's see a pic. who told you you were under-fed?

scroglodyte said:

let's see a pic. who told you you were under-fed?

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Since i posted (and 2 days before) i have watered with a high nute concentration. None of the plants seem undernuted anymore. One (this one) on the other hand has started showing some signs of overfertilization. I have now watered it with only clean water (slightly lowered pH with lemon also). The problem i still have is this: Small buds on all plants. And really red stems on this one. Here are some pictures The leafs are kind of sagging down, the stems are dark red, and small buds with little, or no visible crystals. any ideas?

Also, i now measured runoff water. I dont have an exact number, but its slightly acidic. Probably around 5-6

don't poison them with nutes.........just be patient

They look aight, it could be temps.... it seems to be lacking in some K as seen by the red stems..... also they look aight, the popcorn nugs look more like genetics, and ummm not a very neat/clean canopy I.e. lots of node spaces, and many branches which require nutes be shared alot more and hormones and energy focused all over instead of just into a few main colas.

xxEMOxx said:

They look aight, it could be temps.... it seems to be lacking in some K as seen by the red stems..... also they look aight, the popcorn nugs look more like genetics, and ummm not a very neat/clean canopy I.e. lots of node spaces, and many branches which require nutes be shared alot more and hormones and energy focused all over instead of just into a few main colas.

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You think its a K deficieny that is causing those red stems? I had been thinking it was magnesium or something. Also temps have been falling a little low for a few days. At one point it fell to almost 15C one night. I have been keeping it at 20C quite constantly the last few days though. But would it really turn it so extremely red?

Looks ok to me. How much lighting do you have over them?

intenseneal said:

Looks ok to me. How much lighting do you have over them?

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400w Hps dual spectrum. 5 plants in a 75x75cm area.

But what about the stems and the drooping leafs? That cant be normal. Also look at the fanleaf with the read stem in the first picture. Why only 5 fingers on the leaf? It looks deformed somehow?

over-watered, over-fed. the red stems= stress, not some half-ass K def. that plant is toxic.......not deficient.