Underfed or overwatered?

[Kojiro]

Hi all, noticed a problem with my girls. Not sure what it is.
Strain- cash crop auto
Age - 4 1/2 weeks
Medium- biobizz light mix
Light - Meizhi 270w
Temp - day 28 night not sure
Feed - half litre 6.5 water every 2 days. At week 4 1ml per litre oldtimers bloom. Only had one feed so far.
Noticed problem with lower leaves and not sure if underfed or deficient.

 

[shumway]

Well since you said you've only gave her 1 feed so far i'd go with shes underfed

Biobizz light is meant to be used with feeds pretty much from the beginning,Looks like shes hungry for some p-k to me

We'll tag @Waira in here just in case though lol

 

[7.62]

I'm not even close to being a pro, but it almost looks like splashes from your nutes on the leaves.

Also, I had some Orange Assaults that had lower leaves yellowing similar to yours and the straightened out. Your upper leaves look ok to me.

Maybe take some close up pics and post them for a better diagnosis.

 

[Kojiro]

More pictures. One looks ok, but the other looks worse today. Both treated exactly the same.

 

[7.62]

Again, no expert here, but your plants looks pretty healthy.
They are using nutes and from what folks have told me, the lower leaves will get used up first as the plant is exploding and putting it's energy directly to Bud production.

Maybe bump you nutes up a bit !

 

[Waira]

... That's a little P defc. starting, along with the normal color fade in lowers at this stage,.... each pot, each plant/pheno' is it's own deal, one can be fine, the other not so much, for a lengthy list of reasons,...
Look into getting a soil pH probe, very often what to do next hinges on that info,.. i don't think you have off pH, but that's an educated guess, no better,... off pH, too low, can lock out P uptake,... but given the low feeds, I'd say it's more likely simple lack of, higher demand in that plant,.. Give her a little extra...
meantime look into soil ph probes, they will save you plenty of hassle and pain! I've been using the Accurate 8 for years, not a fancy unit by any means, but it's accurate enough and easy to use,... no substitute for actual in-pot pH treading, run-off is bollocks in soil grows,.... this is the A8, long probe unit..--->hsoil: Control Wizard products,.. otherwise, it's a $$ electrode bulb type, more accurate but a PITA to use and care for, basically a modified pH meter ( which are for liquids only BTW)....

 

[Kojiro]

Iv upped the feed by 1ml per ltr per week. At 7 1/2 weeks they're now on 5ml per litre every second watering. It seems that everytime i just water i get more yellowing leaves all over or is that im now over feeding and im getting lockout ?? Or are the root bound. Pic of roots below. Also iv noticed that the weed smell has lessoned.Feed and watering is at 6.5ph.

 

[Waira]

buds look great, she's eating the P and K like crazy; leaves should be fading at this stage, what i see is normal,... you're getting close, so start watching your trichomes under magnification for color changes,... clear + immature, cloudy/milky = ripe; amber past ripe, starting to form CBN, a breakdown product from THC, plant doesn't make CBN... how much abmer is a personbla choice, factoring the strain's know effects, Indica/Sativa,....more amber makes it narco-sleepy,... a caution though, some strains are stubborn about amber formation (rare) - .. . the leaves, aroma strength, general appearance are also tell's for when she's prime,... personally I take my plants under 15% amber, toher want more, way more on occasion- 30+%! To me that ruined bud unless you want a hammer for sleep,...

 

[Kojiro]

I flushed them today. They're supposed to 10 weeks from start to finish, so only 1 1/2 weeks to go. Tricombes look a little small, but might get better.

 

[Waira]

why did you flush the pots? that strips away the nutes they may still need to finish well,... read up in the Myth Busters section about "flushing"... actual flushing as in copious amounts of water through the pot, vs. flushing meaning no nutes for a period of time before harvest,... some call this a cleansing period, more accurately.... lots of debate about this but a lot depends on the stae of the plant before harvest, and how aggressively it's been fed,...
Your trich's are the best gauge for ripeness, not the breeders time claims,... that's an estimate at best! Amount of fade/tapping of the fan leaves, sugar leaves, and number of pistils that have color changed is also a helpful measure,...