Little yellow dots on fans?????

Here's a pic of said affliction. What might cause this? Never seen it before. Almost like someone took a yellow Sharpie marker and put little dots all over them. Only on 4 sets of fans. Newer growth but not brand new growth. Only on secondaries. Showed up in the past few days. 2-7-7 every other watering, soil, cfl's, 76 degrees

THANKS!!

Also notice that the spots are 99% of the time on the veins of the leaves. Not between where most yellowing will occur.

yellow spot measles

http://members.frys.com/~bpmosley/DISEASES.HTM

first thought, not a doctor at all tho..
just googled and found...

You are ferting quite often.

If you are doing every other water....thats at least...what...2 - 3X a week???? :eek:

Remember these are still weeds and great soil doesnt require a whole lot of nutes.

I would fert no more than 1X week.....if that...

As fat as cunt and whore were....I fed them nutes 4 - 5 X thier whole flower stage.

If I were you... i would chill on the nutes entirely now for at least 2 weeks and see how they respond. Also, I won't nute during the last three weeks at all, so you can see that really, in flower, there is not much time to nute at all.

I just think you might be over dosing the plant.

I say adding nutes to really good soil is the exception...rather than the rule :)

Thanks HD!

Am ferting once a week per my grow journal records. Just as you suggest.

My watering is dictated by the plant/container weight. I weighed them when the plants were small and soil was almost totally dry and now I water when the weight gets close to that weight. So if it weighed 12# when it was small when it gets to a little over 12# I water. Then wait for it to get back to close to 12# and then water. So time isn't what dictates me watering. Weight does, which is more accurate than "I'll just water them every 3 days." It also allows me to water each plant as an individual. Not just watering them all because it's the third day since the last watering or that two inches down from the top of the soil it's dry (never have been able to figure that wisdom out as it might be a goopy sloppy mess 3 inches down from the top!). All based on the weight of each plant/container. They don't always need watering at the same time.

I think if more people watered this way there'd be way less people asking about when to water and having problems with too frequent of watering or not enough. It also allows for more accurate fertilizing. You can go every other watering or every third or whatever schedule you feel best works for that plant and it's all based on when the soil is really dry (or close to it) and the plant needs water.

Yes a hassle if you had 20 plants, but when you have 2 it works great.

I had a medical mj grower that's been doing that for a lot of years suggest to flush it big time as all soil grows allow salts to build up on the roots that hinder absorption of ferts. Said to flush with 3 times the soil volume and the last half gallon use the fert that you're using for (in my case) flowering. The guy's big time into the advantages of flushing and his grows would blow you away as far as yield and health of the plants are concerned.

FWIW

That theory would work. Based upon common logic indeed.

But the million dollat question is not what is the bottom or dry weight, but also, what is the completely saturated water weight?

And I assume you could test as you should need to add the EXACT same amount of water each time...assuming the low weight was the same....

However, did you fail to take into consideration the weight of the added foilage, stems and roots?

If empty with real small roots, your weight will be mostly soil


But....if later on, say your roots quadruple in size and girth.....the same low weight would now be DRIER roots.

I know we're talking ounces here, but at 8# a gallon, it doesnt take much.... :)

I'd up the the water requirement LOW WEIGHT every few days by say a .25 ounce maybe???

Sorry man but im high and theat was good convo :)

Enjoyed it...hope it made snese.

Oh dear Marc :) ....................look just put her in some decent compost, stick a light over her and give her a bit of water when she wants it.
I promise nature will do the rest ;)

Oh, if I lived a bit closer I'd pop round and show you how it's done ;)

Tell you what Marc, have you ever had a car that you always kept clean and had all the regular sevicing and maintance done to it, you know spent a fortune on it..................and then all the dam thing did was keep breaking down :( .............I have. Nowdays it has to fend for it's self and it just keeps running.
Well cannabis plants are kinda similar, the less faffing around you do with them the better they grow.

There you go Marc, a bit of philosofy (can't spell that word :o ) from mand :)


love mand xxx :)

Marc,

Just checked pictures in Cervantes' Indoor Marijuana Hortculture which I found in Boston over the weekend.

Has a picture of similar yellow spotting on the page for Magnesium (Mg) deficiencies.

Suggested treatments in the book - are:

Watering with a solution of 2 teaspoons of Epsom Salts to a gal of water.
"----or--- apply Magnesium Sulfate Monnohydrate".

----or---- Dolomite Lime at planting time.

----and--- then just stuff about temps. Root zone 70-75d F.
Ambient day temp 75d F
Ambient night temp 65d F

Would deff wait and see if Harddon and Zandor agree with the Epsom salts thing tho. Hopefully one of them can say this isn't the same kind of salting that locks up nutes.

Thanks for the replies!

HD, I do adjust for plant weight, but it ends up being very little as my plants are smaller since I'm pushing them along to get done as I may be moving.

As for saturated weight? Each time I've watered I go till water runs out the drain holes fairly well. Not just a couple drops. Running out of each hole. To me that suggests that all areas are fairly saturated. Doing it this way in 5 waterings using this method, I've been within 1/4# or right on each time of the end saturated weight.

As for root weight, yesterday I took the root ball out of the male that just reared his head and washed them all off to see what they looked like. For one thing it was surely not root bound but the roots really didn't weigh much. Ounces. But interesting to see how they actually grow. All out the sides of the tap root and just out of two opposing sides. Interesting.

Mand, You're correct. People mess with these things way too much. I'm guilty of that for sure, but I'm the same way with anything I get into. Never one to just do it the simple way (and a lot of times the best way) but have to get in there and try to re-invent many aspects of the process or equipment used! You should see some of the new concepts I have drawn up for watering and reflective surfaces!

And yep too bad you aren't closer. ;)

Rezinator, Have used Epsom salts before. They worked! But this type of spot was different than what I saw on the other plant that ended up having the Mg deficiency. They're just very small 'detailed' dots where as the ones that showed the Mg problem were larger areas. So that's why I even brought it up. Thought it might be something someone had seen as it seems so 'unique'. Course I'm sure all Mg deficiencies don't look the same with different strains. That could be the case here.

Interestingly when the lights came on this morning and I checked out the girls the plant in question was wilted!! Weighed her and she was lower than she had ever been! Watered it and it's back to what it normally was after watering. So it seems that flowering uses water quicker than veggin'? Maybe that's what she was telling me. GIVE ME WATER!!