yellow spots, curling leaves

[usah111]

hi

I don't think it is urgent yet but I would like to know what might cause these 2 things on my plant and what should I do.


Its the worst plant of 7 plants I have under HPS 400 atm. It also showed some anomalies at very young age. Now the plant is 20 days old (its 20 days after I put seeds into water for germination).

And here are the pics

curling leaves



yellow dots/spots


zoomed out plant

 

[bombadil.360]

what and how much r u feeding them?

is there any water-lodged at the bottom of the buckets?

 

[Japanfreakier]

When ever I see spots on leafs I check for bugs under them

 

[flyer]

this look like something happened to mine

what are the water ph your using?

 

[usah111]

Hello guys

Thank you very much for replies.


It is interesting that only 1 of the plants is showing these signs. Actually there are some small yellow dots on 2 other plants (so they are on 3 out of 7 plants, but this plant on pic has the most of them) and don't seem really problematic yet to me.


I checked for insects and I am checking that as much as possible but I haven't seen any. Unfortunately I don't have a microscope or magnifying len in case they are so small I can't see them with naked eye.

This plant started out weaker as other plants as well.


The soil mix I am using is supposed to have ph between 5,5 and 6. Water I am using is from water network, so maybe chlorine is the reason?

These spots were beginning to show even before I added any nutrients. I add nutrients

NPK-Dünger mit Formaldehyd-Harnstoff und Spurennährstoffen
N P K (Mg) 10,7/6,4/8,6/( 2,4)
+
Chloridarm

I will buy some ph tester papers as I can not afford anything better and will update soon..

edit: lol cannot buy ph tester in stores for horticulture, neither in pharmacy. they just don't sell it.. lol

 

[10k]

You should always de-gas your tap water by aerating it in a separate container like a big empty plastic garbage can or drum with an air stone or better yet a powerhead or circulating pump. This will dissipate the chlorine out of the water in 24 to 48 hours, but having a big water pre-treating drum going all the time is always "a good thing" . Most aquarium chems btw, are NOT good for removing chlorine from tap water as most of them are sodium based so please do not use them.

You should be able to get a pH test kit or strips from an aquarium store.

At this point in time, I would water them with about a half teaspoon epsom salts per gallon dissolved in the water.

Sorry but I just don't recognise that German fertiliser, and have no idea just what "Chloridarm" is ?

ps. Also keep looking for mites under the leafs and if you have been spraying water on these little plants, please stop doing that.

pss... Is that a "blue" strain ?

hth

 

[usah111]

Hello 10k. Thank you for your reply.

Considering the epsom salt advice, you believe it is possible that plant is having mg deficiency? That is what could be possible considering the signs on the plant.

The fertilizer I am using is fine I believe, it is well known fertilizer in our area.

The strain is supposed to be "crystal rain" http://www.amsterdammarijuanaseedbank.com/seedshop/strains/crystal_rain_feminized_seeds.html .

On this site there are some misinformation, that this strain is cup winner in 2005. The closest I get to this info is that this strain is actually "crystal", cross between White Widow and Northern Lights. I don't exactly know what it means its "blue" (like some are blue hehe).



Except this plant other 6 plants look healthy. They are quite green and seem almost "perfect" to my eyes. They growed to around 8-9 inches in 22 days (22 days since I put them in water so its like 19 days since they first saw the light) and have 5 nodes. Since I have 400w I believe it is time to start with flowering cycle. I will transplant them in bigger pots (3 gallons/10-12 liters) in soil that is supposed to have ph 6.2.

I will continue to check them for mites and other insects. I don't think there are any insects on my plants even though they get some 3h/day sunbathing on my balcony (which I might stop doing when flowering).

Thanks again for advice, I'll get that ph meter in aquarium store.



ps: my plants live in room where I smoke too so they receive some tobacco smoke. haha.

 

[10k]

usah111
when I asked if they were a blue strain, what I was asking was if they were a strain derived from the blueberry strain, such as blue moonshine, blue satelite etc.
The blue strains have a tendency to show some wrinkled leaf anomalies when they're very young which they usually grow out of as they age.

The first set of pictures look somewhat like that blueberry anomaly with the wrinkled effect, but also the curled up edges which could be a slight mg def, thus the epsom salt advice. Not all mg defs will show the usual yellowing between veins, but early signs or slight mg defs will have the tell tale upwards edge curling like in pictures # 1 and 3

Now, looking at the next set of photos (pic # 4 & 5) you're now showing, these plants look like they're very over watered too.
Please click my signature link on watering.

The yellow specs you mentioned are always good reason to look very closely for mites especially since you're taking the plants outside.
Hopefully you don't have mites.

hth

 

[smokeymacpot]

imo, looks like the plant with the curling is directly under the bulb, the curling is the plant reducing the surface area of the leaf because its trying to conserve moisture and slow down photosynethis. do you let the soil dry out completely? dont. try raising the light and it should help.
spots on the leaves, like others said, looks like there could be spidermites underneath. ahhhhhhha you have been taking them outside... DONT. that is an easy way to get spidermites.

 

[usah111]

the plant had some weird colors in the start when it was only 1 inch high.

I don't think I am overwatering them. I only give them 2dcl (that is 1/20 gallon of water)/day. I water them twice a day or so with 1dcl.

As it goes for the mites... Yeah thats what I am afraid of but I don't see any animal on the plant. No animals at all. I am looking very closely under leaves and I don't see anything.

Yeah sunbathing might not be the best idea, but those spots became visible even before I moved plants sunbathing..


To my eyes my plants look healthy and I believe they grow quite fast. But I am inexperienced and I appriciate your input very much. Thanks

 

[10k]

I don't think I am overwatering them. I only give them 2dcl (that is 1/20 gallon of water)/day. I water them twice a day or so with 1dcl

Watering twice a day in soil that way is a recipe for disaster.
They should be watered thoroughly and completely when they are watered so they don't suffer dry pockets in the soil,
and then allowed some drying time before they're watered again. please see the watering link.

You say your inexperienced, yet you dismiss experienced advice given to you. wtf ?

Slight mg def AND over watered / improperly watered.

 

[usah111]

You say your inexperienced, yet you dismiss experienced advice given to you. wtf ?

I am just saying that they don't look overwatered to me. I read your method twice. Yet I still don't know how much to water. Comparing my plants to pics of the overwatered plants in sticky thread I don't find many similarities -> Because leaves on my plants are not down but rather up (they are actually very horizontal).

Also plants look healthy to my eye, except for the plant #2 with mg deficiency and watering problem it looks just 85% healthy (lol). Considering their shape and rate of growth. They might be a bit too green (too much N).. They might not be watered properly (I'll change that to watering like once in 2 days, is that better?), some bottom leaves don't have that nice shape.. Overall I think they are doing fine. Also no mites on the plants and no other insects, even though I am sunbathing them haha. And yeah It seem like I burned 2 plants because of light getting to close. They grow so fast and... well some plants are stronger and again didn't get burned and the unfortunate #2 got burned and another one got burned slightly too.


I might be wrong. And I surely don't want a disaster. Your advice is very welcome and it is not dismissed as it might look to you. It is just that I want to know more of "why", as I am not experienced. So that one day I might be able to help other beggining growers.

I thank you for your advice. You are really helping a lot and I appreciate that.

 

[smokeymacpot]

yup he gives good advice on watering. you can soak them till the soil cant hold anymore water, then you leave them for 3,4,5 days untill the pot goes light again. if the soil gets too dry it wont take up the water that you give it.

but do stop taking your plants outside, you have a 400w and that will grow them just as fast as outdoors, with less risk of pests.

 

[usah111]

ok. I understand now how to water plants and will do it that way. Thank you both.