Many Grows, Same Problem. Pics

[Relaxed]

I'm determined to get at least one nice grow under my belt.

This is my 6th grow and all have exhibited this same problem. I've tried many types of soil, nutes, and nute strengths with no difference. These 3 week old plants are under a 250 watt HPS. Temps are about 81F. So far they have received nothing but water.

My plants always start out from seed looking great but after a few weeks the lowest leaves get spots then yellow and die. Then the rest of the plant turns light green, then yellow. Eventually most of the fan leaves die.

If I had to make a guess I'd say I have been under feeding them mostly because I've been trying not to get nute burn.

To the person who helps me solve my troubles I offer my first born child. Thanks to all who offer help.


FYI. The plants are Blueberry, in 6" pots of plain potting soil. Using PH 7.9 to water. I have Pure Blend Pro nutes to be used. Humidity is low at 32%.

 

[Wannabreed]

hi, i had such problem with too high PH water, you should try with ph 6-7 water, using ph-down ^^

 

[CMoon]

howdy bud, those plants are showing nuteriant defficency! half strength shot of common tomato ferts twice a week between waterings will cure it, your humiditys way to low and if you have the time mist lightly from the underside of the leaf when ever possible!

ps dont send the kid unless it comes with state benefits

bests cmoon

 

[maryj315]

I would bet if you put those in a bigger pot and get that ph down to 6.5 as already stated by WANNABREED those plants will be just fine just my 2 cents

 

[Relaxed]

Thanks guys.

They'll be in larger pots this evening. I'll give them a full strength watering with PBP and adjust to 6.5-7PH.

 

[smokeyla1]

I would first get that ph under control before giving any more nutes, plants can show a defficency from a ph imbalance and if you already have a good concentration of nutes in the soil you could then burn them, therefore compounding your problem. You should check the ec\ppm of the soil before adding nutes and you can use garden sulfer I believe to lower ph.

 

[stinkyattic]

Does your water come out of that tap that high or are you raising it on purpose, adn with what?
PureBlend is a good choice for problem water becuase of the humic acids in it. Mix up a half strenght grow solution and test the pH of that- I bet it's about 7. that's not bad considering that your potting soil is peaty and peat soils drop in pH over time. Check your runoff and try to target it to 6.7 by adjusting feed pH.
They are hungry. Feed them! Starting weak, or course.

 

[Relaxed]

My bad. I recalibrated (again) my PH meter my tap water is at 7 and the nutes/water was about 6.6. I haven't tested the soil yet. All the plants got a dose of mid level feeding and I'm repotting after I finish here. I'll check the runoff when I do.

Can it be possible that over all these grows I've simply been underfeeding? I usually fed at half strength every watering.

 

[CMoon]

if your taps 7 m8 id give reading run offs a miss, in good composts the ph buffer aids the grower and with a short 12 hour water bubble with an airstone should knock several points off your tap ph

Can it be possible that over all these grows I've simply been underfeeding? I usually fed at half strength every watering.

yes indeedy, watch the nettles outdoor that grow in poor ground, then check the angry moffos lurk bye river banks........rise your fert strength gradular to the norm first 7 days of bloom, ime N is the key for up to 21 days of bloom strain dependant, ie ive some quick finishers that prefer to be off N ferts at day 7........experience with the same strain cant be gained from a book or any growsite but theres some fine data out there to show you the way.......hope it helps

bests cmoon

 

[Relaxed]

Thanks again for the great advice guys. The plants are now in one gallon pots and will be moved to something larger once the males are culled. They did appear rootbound. The tops are starting to look a little more green though the lower leaves are still yellowing.

Next watering I'll give them a bit more nutes and see how they react.

Can anyone point me to a feeding schedule using Pure Blend Pro? The jug lists 3 different feeding strengths which I will use at full strength every watering.

 

[B.C.]

FEED ME!

FEED ME!

Can it be possible that over all these grows I've simply been underfeeding? I usually fed at half strength every watering.

If they all looked like these plants, yes! When there isn't enough soil you have ta feed more often because there's no extra buffer of food in the soil, so it will show up quickly once they start getting root bound..... Don't worry so much about over feeding, yer gonna see signs of over ferting long before you do perment damage in soil: Dark green leaves, leaf tip burns, etc... If ya do over do it, simply flush the soil and let em coast fera bit. No big whoop! lol It's one of the biggest pluses to useing nutes from a bottle. Btw yer PBP is for soil, correct? BC

 

[Relaxed]

Yep, the PBP is the soil version.

In the past day or two I've also done a few foliar feedings with the PBP.

Today the plants look a little perkier than the above photo. The tops are slightly greener and the lower leaves are no worse. It looks like I'm on the right track thanks to much helpful advice.

BC. Thanks for pointing out the pot size issue. I hadn't realized that the soil acted as a buffer. My only concern there was if the plants were root bound. What would be a proper sized pot for plants that will end up 3-4' tall? The largest pots I have are 3 gallons.

 

[Kooza]

Good rule of thumb is 1 gal per 12 inches of plant.

 

[B.C.]

Good morning, Yeah I think they jus needed some room ta stretch their legs alil. lol Fresh soil should have em back to bein happy and vigorous in no time! About the pot size, I agree with Kooza, a foot per gallon is a good rule of thumb ..... That's a bummer yuv had problems every grow. We can't have that, you have any more problems jus hollar. I don't think ya will tho, esp if you end up going to 3 gallons when you flower. Don't be afraid ta feed em more if you think they need it. Remember you can always flush if ya over do it. Learning ta read yer plants is the best advice I can offer anyone, cuz they'll tell what they want, you jus need ta be aware of it. Anyhoo, good luck! Take care... BC

 

[stinkfinger]

nitrogen def.. try giveing those babies some GROW @ 7-10ml per gallon, maybe some LK and Cal-Mag too. About 5ml of each.