First grow, I need help with unwell plant!

[smokersuniteuk420]

Problem: one plant has yellowing on leaves and one is curling a bit on the serrated edges and the leaf tips are burned

Medium/grow method: 50/50 coco/perlite, run to waste.

Feed: and supplements used: canna coco A&B, canna calmag agent, canna cannazym, canna rhizotonic.
Feeding around 800-900ppm
3ml of canna A, 3ml canna B, 2.5ml of cannazym (once a week), 2ml rhizotonic, 3ml calmag
water source: from the tap but left to dechlorinate for 24 hours.

Strain/age: cherry bomb/26 days old and northern auto 30 days old.

light used: Chinese 1000w led (actual draw 282w) and Chinese ufo led with an actual draw of between 50-70w on 24 hours

Climate: temps averaging 26℃ rh averaging 60-70%, intake fan on 24hours circulation fan on 24 hours extractor on for an hour consecutively meaning hour on hour off. 2.5x2.5 foot tent.

Additional info: I always water at a ph of 5.8 +/- 0.1

The first three pictures are the cherry bomb auto and the other three are the northern auto

 

[Heavily Medicated]

The plant with the yellowing is Mg def. You need to up your Ca/Mg sup. The other plant is showing slight nute burn, I would not up my nute strength any more then where you are, maybe even back off a little.

 

[smokersuniteuk420]

The plant with the yellowing is Mg def. You need to up your Ca/Mg sup. The other plant is showing slight nute burn, I would not up my nute strength any more then where you are, maybe even back off a little.

Thanks man, I'll be upping the calmag for the next feed, is it okay to use more than the recommended dosage? Yeah I'll half my nutes for two feeds and give her a flush. Thanks again, very much appreciated.

 

[Heavily Medicated]

I don't think you need to flush, it's not that bad. Just adjust concentration accordingly. Many growers only give nutes every other time alternating with water only or water with CaMg. I use GH CaliMagic and often have to give as much as 3 ml/L during flowering. It feasibly is possable to give too much CaMg, but it would be a rare thing to OD your plant with CaMg. The LED lights really sap the Ca and Mg out of plants. If you used distilled or RO water, you would have to add even more.

 

[smokersuniteuk420]

I don't think you need to flush, it's not that bad. Just adjust concentration accordingly. Many growers only give nutes every other time alternating with water only or water with CaMg. I use GH CaliMagic and often have to give as much as 3 ml/L during flowering. It feasibly is possable to give too much CaMg, but it would be a rare thing to OD your plant with CaMg. The LED lights really sap the Ca and Mg out of plants. If you used distilled or RO water, you would have to add even more.

Thanks mate this has really helped me. . I heard that with coco it's good practice to feed every watering, have I heard right or is this just a myth? I've kinda got a feeling I went wrong with cannazym I've used it for the past 3 waterings because I got confused after reading my feed chart but I'm sure I'm only supposed to use it once a week. I'm on tap water at the minute, it comes out of the tap between 120-150 ppm, I mixed 5ml calmag to 1200ml water and ive been spraying twice a day with that and they seem to be liking it

 

[Waira]

... yes, do not not flush! In coco, this is done differently vs. soil, and usually isn't necessary unless it's been badly overfert'ed or way off pH,... And yes on the nutes in coco, or at least Ca-Mg in the water.. never just water alone; coco is a very different medium to grow in, even compared to other soilless media,.. it's odd CEC characteristics are behind the why for some of these,... it's a seriously strong binder of Ca for one thing, hence the need for constant elevated Ca-Mg,... flushing, IF needed should be done with a special made solution of RO/Di water, 150ppm of Ca-Mg, and 150ppm of nutes, at 6.0 pH; pour through until run-off is at or close to what's going in,... all this is necessary to maintain that CEC balanced state that coco needs to work best,... You can do a foliar spray with epsom salts at 1tsp/L to treat the Mg defc.,.... up the dose of Ca-Mg too until it stops progressing,...

 

[smokersuniteuk420]

... yes, do not not flush! In coco, this is done differently vs. soil, and usually isn't necessary unless it's been badly overfert'ed or way off pH,... And yes on the nutes in coco, or at least Ca-Mg in the water.. never just water alone; coco is a very different medium to grow in, even compared to other soilless media,.. it's odd CEC characteristics are behind the why for some of these,... it's a seriously strong binder of Ca for one thing, hence the need for constant elevated Ca-Mg,... flushing, IF needed should be done with a special made solution of RO/Di water, 150ppm of Ca-Mg, and 150ppm of nutes, at 6.0 pH; pour through until run-off is at or close to what's going in,... all this is necessary to maintain that CEC balanced state that coco needs to work best,... You can do a foliar spray with epsom salts at 1tsp/L to treat the Mg defc.,.... up the dose of Ca-Mg too until it stops progressing,...

Thanks that's a great explanation, I cut my nutes to a third of what I've been using but added more calmag and it sent my ppm sky high but the problem seems to have stopped progressing from what I can see so hopefully they'll be okay my calmag is npk 6-0-0 so I think I'm going to get a different one with less nitrogen. My coco seems to be stable although I forgot to check the run off on the last watering but I usually water at ph 5.8 and my run off is usually between 5.8-5.9. Also if you look on the picture of the side of the pot it's going a bit white and I was wondering if this is a build up of salts or just off my perlite because it's a 50/50 perlite/coco mix, I've been using the run to waste method of feeding. Thanks again for the help

 

[Waira]

...what ppm's are you talking about here? It is possible to overdo Ca-Mg, too much will interfere with other nute's uptake, so regardless, stay withing general guidelines for ppm's and the stage of the plant, and it's size as well,..always be mindful of you cumulative inputs, and what the plant is taking up in proportion to it's size,... coco is run more like hydro, frequent, lower dosage nutes,... because it breathes and drains so well, it can handle more watering/feeding,... pH looks good! ... oy, that Ca-Mg is definitely not good for bloom period, and should be applied carefully even in veg because of the high N content! It''s a pain in the ass dealing with such formulations; other nutes, like typical 3-part micro/grow/bloom meant to be blended at different ratios have complete nutritional profile when done so, or modified (like Lucas formula) to make sure all the bases get covered,.. if you reduce the grow or micro to compensate for the damn Ca-Mg, you're shorting the plant on other nutes, especially the micronutes,... so yeah, get a different brand... the CaliMagic mentioned is great, 1-0-0,...
your tap water, what's the ppm and pH on that? mineral and nute salt build-up on the outside base of the pot is a distinct possibility,.. has it been used before?

 

[Hippy_BiotabsF70]

There's a low N CalMag available on Amazon in U.K. called pro cal by Green Planet mate. 1.1:0:0


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[smokersuniteuk420]

...what ppm's are you talking about here? It is possible to overdo Ca-Mg, too much will interfere with other nute's uptake, so regardless, stay withing general guidelines for ppm's and the stage of the plant, and it's size as well,..always be mindful of you cumulative inputs, and what the plant is taking up in proportion to it's size,... coco is run more like hydro, frequent, lower dosage nutes,... because it breathes and drains so well, it can handle more watering/feeding,... pH looks good! ... oy, that Ca-Mg is definitely not good for bloom period, and should be applied carefully even in veg because of the high N content! It''s a pain in the ass dealing with such formulations; other nutes, like typical 3-part micro/grow/bloom meant to be blended at different ratios have complete nutritional profile when done so, or modified (like Lucas formula) to make sure all the bases get covered,.. if you reduce the grow or micro to compensate for the damn Ca-Mg, you're shorting the plant on other nutes, especially the micronutes,... so yeah, get a different brand... the CaliMagic mentioned is great, 1-0-0,...
your tap water, what's the ppm and pH on that? mineral and nute salt build-up on the outside base of the pot is a distinct possibility,.. has it been used before?

Sorry for this late reply I've been uber busy, the mag deficiency seems to have stopped progressing, I've been misting them with 5ml cal mag to 1 litre of water set to ph 5.8 and I've stopped adding cal mag to their feeds and brought my ppm down to about 600, on the last feed my runoff was like just over 2000ppm should I be worried? My ph stayed around 5.8/5.9 but I know coco ph can't really be tested by run off. I've been watering once every 2-3 days and I use 2 litres for each plant getting about 30% run off I am worried about the white stuff on my pots though I didn't think I'd get salt build up as I've always watered to waste they've been getting 2 litres of water/feed since they've been about ten days old so I used to get about 1.5 litres of runoff off them so I thought that doing it this way would wash out any impurities in the coco (it's a 50/50 coco/perlite mix what I use) I'll definitely be getting some lower nitrogen cal mag as soon as I have funds. My tap water is good so I've been told, I test it and it normally falls in the 125-150 ppm range with a ph reading of around 7 +/- .5, once I've added my nutes that brings it down to 5.8 +/- .2, I've also got cannazym I use once a week as this is supposed to break down dead matter and turn it to micro nutes. Thanks for input you've been amazing