Sick plants, need help please.

[oscli]

hi

could someone please help me identify whats wrong with these young plants.

my guess is that its leaf spot fungus but i would like this confirmed by someone more experienced than me.

they are in compost, ph set to 6.4, only on water so far. all plants are affected the same, although this is the worst one.

cheers

[c-ray]

calcium deficiency perhaps
what is the pH of your runoff water?

[oscli]

hi cray

the run off ph is 6.5.

im pretty sure its not ph related because ive not changed my growing habits at all, i always set the water ph to about 6.4-6.5 and ive never had this problem before.

[The Cannarchist]

Calcium gets locked out of soil growing at ph levels of 2.0- 6.4
Calcium is absorbed best in soil at a ph level of 6.5-9.1 (Wouldn’t recommend having a ph of over 7.0 in soil) anything out of the ranges listed will contribute to a
Calcium Deficiency.


I'd say calcium as well.

What is in your compost?

[oscli]

hmmm... ok, i'll raise the ph slightly and see if that makes a difference.

i dont know whats in the compost, as such, its just the one i buy from the grow shop... its never given me this problem before which is why im reluctant to believe it a ph problem...

i dont wish to appear disagreeable or anything and i do appreciate your help... i'll raise the ph feeds to 6.6 and see how they get on. theyre due a watering today.

thanks

[The Cannarchist]

a peat and perlite mix?

[oscli]

a peat and perlite mix?

its a peat free soil.

by compost i mean a multi-purpose soil which already contains food in it good enough for 2 weeks.

we call soil compost in the uk.

the perlite was already in the compost, i didnt add it.

[c-ray]

your 'soil' is probably deficient in calcium, you could work 1 tbsp of dolomite lime into that small pot, or you could transplant into a larger pot and add 2 tbsp...

[oscli]

thanks cray.

i decided to give cannachist idea a go and increase the ph slightly from 6.4 to 6.6 to see if that does the trick.

if that doesnt work, i'll give your suggestion with the dolomite lime a go.

thanks guys.

[The Cannarchist]

B&Q crap compost...........Or similar.:kitty:

When starting out mix one cup of Dolomite lime into 70 ltrs of that stuff.That will solve any future problems.

(PS....Hope you did not have any money stashed in Northern rock BS...Great viewing from this side of the pond though....:drama: )

[what372]

im having the exact same problem sept its only on the two eldest leaves it kinda looks like rust or something

[Green Supreme]

Maybe you should try whats suggested in this thread then. By the way welcome to the site. Peace GS

[Stone]

Yes, it looks like a Ca. problem. But, Ca. problems are rarely caused by a lack of Ca. So, adding more Ca. is not always the correct answer. More often than not this is caused by environmental issues. Over or under watering will cause Ca. problems. Low rootzone temps will cause Ca. problems. Too high or too low RH will cause Ca. problems. If you have any of the above conditions you may have Ca. problems. IOW, if you do have a Ca. symptom it's not usually due to insufficient Ca. in the medium but rather one (or more) of the issues I just listed above. Ca. is a real bitch, I know, I've BTDT.

[Janosh]

It emarasses me to say this but you guys are usually way over my head with technical terms, let alone abrievations.
WHAT does RH stand for????
I've been living with this problem on and off for years. Trying to stay organic, fighting bugs, etc. has become more than frustrating at times.
Whoever put this list together loves me very much.
Thank You all.

[Parabola]

RH = relative humidity

http://en.wikipedia.org/wiki/Relative_humidity#Definition

[Janosh]

Thank you!
There is a good chance this may be a problem as I know it changes quite a bit what is a good range to shoot for?

[spaceman]

i like these pics

[g-leaf1000]

hi

could someone please help me identify whats wrong with these young plants.

my guess is that its leaf spot fungus but i would like this confirmed by someone more experienced than me.

they are in compost, ph set to 6.4, only on water so far. all plants are affected the same, although this is the worst one.

cheers

[g-leaf1000]

its the compost...dont use peat free...dont use B&Q compost...miricle grow is verygood..even better is bio bizz along with there nutrients.DO NOT AJUST PH LEVELS when using soil.this kills the soils benifical mirco organisims!!!!!!!!!!!

[g-leaf1000]

bio bizz soil,bio bizz nutrients(grow,bloom,topmax),superthrieve,batshit. uget very green and healthy lookin plants..dont worry if the leafs r crappy,its part ov the problem growing indoors.pull them ov when they get very bad.the plant will still grow&produce nice bud.if u cant get bio bizz,use MIRICLEGROW