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Any ideas on whats happened here?  


Austin15
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Geraniol
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Hey there growing in soil feed nuits at roughly 25percent of recommended dose. Just one plant has purple stems any ideas guys? Thanks heaps

iOS image upload (4)
iOS image upload (3)
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iOS image upload (1)

 Couple of extras too showing the other plants.

Ps clicked solved by accident 

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James
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Linalool
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Posted by: @austin15

one plant has purple stems any ideas guys?

Purple stems are a sign of missing Phosphorus.

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Austin15
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@james

That is what I thought but I didn't know if that explained the dying leaves

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James
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@austin15 I do not know that with the drying leafs as well - I am actually a Coco Grower - Our Pro Soil Growers will know for sure.

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Austin15
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@james so complex these things of ours.......

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Macky
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one of those colas there is like turning a dull brown/ grey colour, this concerns me as it could be bud rot. 

Can you get a close pic of that bud for me please mate?

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Austin15
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@macky hey I did consider bud rot too but I got some more pics from my m8 and on looking closer it looks purple to me

 

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Macky
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Maybe its just the purpleness. But keep a close eye on things there! 

They look hungry for some PK too mate, I agree with James. This will cause the leaves to dry out too as they P and K will be taken from the leaves to feed the buds. As more and more are taken, then leaves start to look pale. Also, thin blades on the leaves is a classic sign of potassium def. 

Let us know what youre feeding, and how much per litre and we will see if that can be improved Smile

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Austin15
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@macky thanks heaps mate so the nuiets are called Goliath and there is a general a and b which is used full time then a bloom part 1 and 2.  They recommend 7ml per L of A and 7ml of B per L, as well as 5ml bloom part 1 and 5ml part 2 per L but that originally was too much so I do 5ml of everything per 3L of water because of the reduced amount I water daily with 1L or so of water, 2x days nuits 1x day water repeat. 

Water on its own is ph 7.7 and 95 ppm and 188 ec

Nuites mixed up in that water ph is 6.77 and 303 ppm and 580 ec.

Screenshot 20200616 005631 DuckDuckGo

 

I don't really understand the ec etc i do know its low i just don't really know how to adjust it other than possibly put more nuites in water?

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Macky
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Ok mate, there is a lot to go over here. We might have to start from the beginning to get this sorted Smile

It seems like way too much food, which can cause salt build up, also the pH has been way too high, for foil you should try and get the ph to 6.5 for best result, anything up to seven but things will start to go bad if its get too high. 

You mentioned EC, do you have an EC meter? Because that will really help in this situation. 

What i think has happened is you have over fed them, and you have salt build up in the medium, and the ph is off, so the plant cant eat properly, no matter how much you feed it. 

I think the best plan of action would be for a big flush to get the salts out of the soil. Then re feed at a lower dosage. 

I would go for something like, 1.5 ml of the general a n b per litre, and maybe 1.5 ml per litre of the bloom booster a n b

Look at the top of the chart you have posted mate and you will see that feeding ration is for tomatoes. Cannabis is a herb and doesnt need half as much food as a tomato plant does. So over feeding will be the most likely cause of these problems Smile

Flush, re feed ad a lower dose with ph 6.5 she will start to look much better in a couple of days 

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Austin15
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@macky. Oh awsome mate thanks so much and yes I brought these from a hydro cannabis growing store and I thought it was tomato growing but not meaning tomatoe if you get my drift yes I have an ec meter......and wow your recommended dosage is way lower i thought I was being good by doing only about 20-25 percent of recommended 

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Macky
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Throw them charts away now mate, you a member at Percys 😉 Each plant id different, you have to learn how to read what they want, and give more when they need it, and less when they have too much. 

Less is more in this game, i never feed my plants more than 1.5ml per litre of a n b, and rarely over 1ml per litre of PK booster, and i get some nice grows. Keep it simple n shit, easier to fix and under fed plant than an over fed plant. 

We can explain how it all works and youll be fine mate, its all a learning curve Smile A lot of new growers stat off with overfeeding the plants. It a common mistake, but not a big one, so easily fixable after  flush and refeed. 

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Austin15
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@macky. Lol I will do thanks man worse still is I read so much on how everyone over feeds that the nuit places always overstate it to sell more... im glad can still be fixed but like u say first grow have learnt heaps charts can go in the bin... while I have you here how do you suggest flushing? I've read basically 30L of water through the pot which is 18L

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Macky
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best way to tell if youre over/ under feeding is:

Mix your feed, and measure the EC, say it is 1.2

Feed the plants, and measure the Ec of the run off ( The water coming out of the pot)

If the EC of the run off is coming out higher than the feed going in, you're over feeding and the plant isnt eating everything you're giving it. This will build up over time and cause problems

If the EC of the run off is coming out lower than the feed, then the plant is using more than you're giving it, so you need to increase the dosage of the next feed. 

Adjust the feed by 0.2 EC each feed until there is balance. Having the EC coming out 0.1-0.2 point higher then the feed going in is perfect. 

 

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Austin15
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@macky see had no idea about that what so ever.... wicked I look foward to lights on tommorrow thanks heaps

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Macky
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@austin15 Neither did i when i started growing 😉 Lots more to learn to mate Smile Just take it step by step, and ask questions when you need help and youll do fine 

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(@macky)
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Posted by: @austin15

I've read basically 30L of water through the pot which is 18L

Pretty much mate yes. Or flush until the EC of the run off is lower than your feed 😉 

Plants like consistency, once you find the right level and hold it there, the plants will learn to work with it. 

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Austin15
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@macky hey there so I flushed the soil I thought I would take readings of the run off this is what the results were 

260 ppm

536 ec 

7.95 ph 

Thoughts? Ph seems high to me but the others are below feeding rate

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Austin15
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@macky here are some photos of the same plant tonight

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