over-fertilization or under-fertilization

[tkd1985]

Hi there,

i used google and forums but couldnt get a possible solution but my problem is progressing...

Started from the top.

2x Blackberry and 1x CC54 in day 21 after switching to 12/12.

I used organic fertilizer, always 25-50% of the instructions provided, only added a bit of magnesium sulfate in my water pot. (3x knifepoints on 10 l water)

Anyone an idea?

PS: pls advise if i managed to delete those exif details correctly.

Thanks in advance.

 

[al70]

hi tkd, are the tips of those leaves red ? they look red in the photo ?

 

[tkd1985]

Hi al,

doesnt have a more sharp one, very old cam.
tips are in kinda "rusty" color, prolly necrotic (!?)

Its affecting only the tips around the leaf, partially a few spots on too.

Flushing will be very hard cause they mostly tied to the net due to the big stretch.

 

[highocaine]

Calcium Deficiency: First visible in newer growth, leaf tips will die, tips may curl, growth is stunted. there will be a weakness in stems/branches. underdeveloped roots, and bacteria problems can arise. *can be cuased by too much potassium/nitrogen* calcium deficiency is commonly mistaken for over ferting. its key to notice in these pics that early stages of deficiency appear in the serrated edges/tips of the leaves, but its not just a death/necrosis, its a small circular spots of death, not just burn marks. young leaves will develop dwarfing, a strap-like shape, and shoots stop growing and thicken.

 

[kiwi_growa]

Nute burn and probably lockout from wrong PH values. Have you measured the PH of water? The magnesium sulphate will drive the PH down substantially.

Have you tried flushing with R/O water yet? What's in your organic fert? Most will contain traces of calcium.

 

[al70]

i'm not sure about organics but when switching to flower with chemical nutes I've been advised to cut back a little, it sure looks like nute burn

 

[tkd1985]

i can just measure the ph of the earth and its depending on watering time 7+ ,
providing to a plant 3x day 120ml / each , they around 90 cm now.

(iam just having some jiffy fertilizer with npk 7-3-6 byside of my old alga bloom 1,5-13-14)

had a little dosis of valerian brew containing little nitrogen in my tank too but i wonder if this could cause some overfertilization but i dried the earth one day after setting up my new drip system.

so what to do - give stuff or flush

 

[tkd1985]

the alga bloom should contain some calcium - could it solve the problem?

 

[al70]

I wouldn't flush them tdk, just feed them until your getting about 25 % run off n see how they get on.

 

[al70]

ease off on the nutes a little until they're looking better

 

[tkd1985]

am giving some mykorrhiza to support the actual culture in the soil + little alga bloom, lemme see whats gonna happen - what do you say. its 1,5-13-14 npk organic - would have started in ~ two days normally.

 

[al70]

once again tdk, i'm not sure about organic nutes, you know yourself, just don't give them as much as you usually do until they recover, goodluck

 

[tkd1985]

will give em 2 ml on 1 l , soil isnt dry so it should have some drain, normal dosis will be 4 ml on 1 l .

 

[al70]

give that a try, goodluck

 

[SunGrown]

I think you are under feeding possibly. What brand feed are you using?

 

[tkd1985]

fert. for smaller plants from Romberg (7-3-6) and i got the old Plagron Alga Bloom rev with lower N (1,5-13-14)

 

[SunGrown]

U should be fine to feed at 10-15 ml per gallon of water every day, IMO. Try it one or two plants if u aren't sure and see the difference.