MH bulb from start?

[dvine]

Hello ppl!
Ok now im gonna go breserk soon, i have solds seeds to ppl and given them tips on what soil to use and they use normal tapwater just like me BUT when i do just like them my stupid plats looks like they get burned starting from the tips on the bottom leafs as soon as i start getting more then 1 set of leafs. Only difference i can come up with is that i use a 250w MH buld at 40cm distance at a heatlevel on about 25-28 celcius. The only difference i can come up with is that i use a MH buld and they use florecent bulbs (low energi bulbs in swedish).
I have tryed alot of different soils and tryed to water them different much. The ph level differs on all soils (watering with 7.0ph water and measure the drain water), it goes all from 6.0-7.5 (depending on soil) and they all show the same symptom. The only thing i can now think of is the damn bulb.

Light bulb Philips HPI-T 250 W. Pure blue/white light for the growing period.
This metal halide lamp is not suitable for the flowering period since it lacks the yellow/red light.
This light bulb has 19,000 Lumen.

thats the bulb. Is it ok for me to have that bulb direct from seed?

 

[Guest]

Are you using dolomite lime in your soil mix. It sure helps resolve a lot of leave issues. You can grind up pellets in a coffee grinder and make a tea out of it and add as necessary.

 

[dvine]

The things is that i have tryed different soils other have succeded to use flawlessly with my seeds! It have not matterd if the drainwater have been 6.0 or 7.5. The look of the plants are still the same

Its something like my 3rd atempt or something and the problems wont go away, it keeps eating up the plant while the growth stops :/ the only leavs it do not touch is the 2 first green round leafs. The 2 round leafs stay green forever ^_^
They low a bit "down" but tahts becouse i just waterd them i think...

 

[dvine]

The thing is that i have used the exakt same soil and have had 2 wounderfoul grows with these seed. The only difference is that i have moved to another part of town (still same watersupplyer) and switched from LE to MH bulb. I recomend my soil to other who have bought my seeds and for them it works perfect! Only difference is that they have there water and use LE(low energy, florrecent) bulbs.

Im gonna try and make a completly nutrient free soil and both 6 plants under MH and 6 plants under LE bulbs and see whats happens.

 

[dvine]

Ok i have rooted the seeds and now planted them in a soil that have a drain water of ph 7 (should be rater good i belive). The soil is almost nutrient free. Theonly nutrients i put in it is 1tbs of dolomit per 1 liter (contains calsium and magnisium and make the ph go up some). Im gonna put 5 pots under a MH bulbs and 5 under 6*20W LE(florrecent) bulbs. It iwll take about 2 days for them to come up and about 2 weaks to see if there will be any better improvments, if both grows well then there was a nutrient burn, if the ones under MH will be burnt then its becouse of the bulb. I will post the results later

 

[dvine]

Ok sorry for spamming my own post but i have to share this info as well.
I tryed for some time ago to put a seed on a nutrient free cylinder shaped thing (look at picture) and then place it in my normal soil that seams to burn the plants. The roots have barly come out from the cylinder thing (about 1 cm). I can only see 2 rotts that are about 1cm each. The plant are heavly dammaged altho they have barly got any nuts from the soil, or was thouse 2 roots enoght to kill the plant?

this plant have grown slower then the rest :/

If its not the nutrient who have burn the plant then what is it then? can it realy be the light?

 

[Guest]

Pictures tell a lot. It sure looks like heat related, but there could be other reasons. I saw that one year when my temps were get 85 deg and above. They should recover.

 

[bpo]

i'm on my first grow and almost all my plants first leaves had that same problem. i didn't really worry about it much and just kept watering and everything turned out just fine. those leaves will probably just fall off anyways. you can look at my gallery and you'll see that some of my babies turned out fine.

 

[dvine]

my plants dont turn out fine, they stop in growth and the "burn" just keep crawling up, from the outside on the bottom leafs and when its done with that i continues on the leafs above the already burnt ones.

It can not be heat related, i have 2 differet termometers taking the temp. Both of them have aluminium foil above them to remove exposure of direct light, you can say they are always in teh shadow. I have realy good cirkulation with cooltube and long distance.

 

[Guest]

try leaving them under the soft flourescent lights a lil longer some 4 ft shop lights will do perfect about 4 inches awat from the tops then only water no other stuff and also i only water them with bottled purified water when they are that little buy a case at the grocery store and set it somewhere where it can stay room temp. till u need it. hope this helps peace out.

 

[Frozenguy]

It is not the light!! I have used my 250MH to germ seeds and my 600HPS (which is air cooled).. temps anywhere from 75-85.. that burning is medium related.. unless your spraying something on them..

by medium related i just mean like, water or something

you say you moved?? well i would get a water analysis of your town.. whats your tap ppm and ph??

if its under say 70 its soft water and i bet its highly salted.. they use sodium in most water softeners and it will be the first thing your plants take up and it will lock everything else out.. that or your feeding WAY too much ..

whats your ppm coming outa tap??

seedling with mh




seedling with hps



different strains different ages obviously.. all OF/LW and lime.. thats all.. basic stuff..

 

[dvine]

I moved but not that far, im still using the same water suplyer.
(directly translated from swedish)
hardness: 2,5-3,0 germen degrees.
Alkalinitet: 60 mg HCO3/l. (dont know whow to translate this)
pH-value: 8,0. (i adjust it down to 6.6 and use the same water in my spray bottle)
Radonvalue ca: 40 Bq/l.

You say it might be something i spray on my babies, i spray the same water as i use to water my plants with and that is normal tapwater that i adjusted tp 6.6-7.0ph.
Worth saying is that i have tryed to use rainwater as well to both water and spray with but with the same result.

Can the "ph down" for grow couse problems, it contains some small parts of nutrients.

 

[dvine]

alright, now i have a total of 32 test subjects under 10 20w Bulbs, 10 of them are not nutrient free.

 

[dvine]

Did a rinoff test on the non nutrientfree plants and they had a ph value on 6.4, did water them some more with 6.7ph water and soon they where 6.5 in ph. So far all plants seams to be "ok". Tomorrow or the day after that i will do a rinoff test on the nutrient free plants.

 

[DIGITALHIPPY]

i think your soil maybe "hot" or it has spots where the nutes are concintrated.

i would try to flush it out by putting 2-4 gallons of water through it you will disolve some of the salts in the soil.

looks like compost with perlite??

thoes seedlings look sad, i feel for you brotha.
the light does not matter.





these plants turned out great with MH
fox soil.

im thinking there is alot of PPMS in your tap water.
next time try getting a few gallons of distilled water.
i always have to feed my seedlings within 1 week of sprouting. the yellowing circle leaf theory is bogus, unless the plant is telling it not to feed it.

all that said, i bet u have hot soil with high ppm tap water.
if the PH is ok (sounds like u did alot of testing with ur tap and PH), sounds like it is, its the high ppms in the water. usualy junk too nothing the plant wants, and MJ eats hearty.

 

[dvine]

How about that i flush my soil the first thing i do before it put it in my pots, would that remove some hot stuff in it?
How about that i try to fluch my plants evry time i water them now in the early stage to make it impossible to let any salt build up?
What hurts the plant the most, 6.0 or 7.5 in ph? (or should is say "what is less worse, more then 6.8 or less then 6.5")

Thank you so much for all the replys i get, it helps alot to hear your thoughts!

 

[neongreen]

Are you letting the soil dry out between waterings?

 

[dvine]

Ok i think i know what might becouseing it altho its hard to admit it. I think its the pH that messes with me and im gonna explain wy. Last time i did grow these seeds without any problems is when i used normal tapwater to water with.
My tapwater is around 8-8.5. Atm i watering with 6.5-6.8. The soil im using (all of them) are slightly acidic and when i use a low pH on my water i watering with then the drainwater will become acidic so basicly i think its my soil that is to acidic. I think all soil i have is adjusted for normal tapwater ph level and therefor are not fitted for 6.5-6.8 watering water.

Lets say it like this as i sad now. Does the plants grow less or something if i use normal water with high ph to correct the ph problem or do i have to correct the earth and use correct ph on the watering water? Does tha plants take any dammage from having slightly acidic soil and be waterd with a water with a hig ph?

Many questions but i hopr you can answer them.