Orange/bronze leaf margins on seedlings

[Erin Kerrik]

WW & GF from seed. Started in 1.5" rockwool, R/O pH adjusted 6.0, very weak (1/4 tsp / half gallon) SuperTea 5-5-1. In humidity dome under flourescents.

Transplanted into 1 gallon pots after 9 days & first true leaves developed - 60% Ocean Forest, 25% perlite, 15% vermiculite + 1 cup dolomite lime for the 17 gallon batch. Some cotyledons were half yellow at the time. Watered with R/O 6.0. 400 W MH, 20-30" away.

Foliar fed a few times w/5 drops fish mix (something like 7-3-3) per 500 ml.

Watered w/1 gallon R/0 water 6.0: 2 tsp Big Bloom, 1 tsp B'Cuzz Root Stimulator. A few of the tips looked like they had slight N burn.

Sprayed with Serenade Disease Control yesterday: http://www.seedsofchange.com/garden_center/product_details.asp?item_no=S16734

Pics today, 16 or so days from seed: bronze/orange dry areas around some leaf margins. Both GF are affected, 3/5 WW are, both C99 are doing fine.







OF a bit too hot even at 60%, lay off the fish mix? Need more P & K?

Thanks.

 

[Guest]

looks like burn, sounds like you're adding a fair bit of nutes. I dont even feed my seedlings at that size usually, in fox farm ocean forrest.. and if i do its at 1/4 strength..

I dont know why you thought it'd need more P or K, girls dont need so much of those in veg; nitrogen is the main veg mineral.

I suggest you try just giving them water for the next feeding or two..

 

[Blackmelo]

so wait you have some seedlings that are in vegg growing in soil.

And you decided to feed it some flowering nute and use a ph suitable for hydro and not soil?

Looks like you have started a hobby without researching it properly first mate.

 

[sproutco]

> Lights need to be closer than 30". Maybe 15" (38cm) would be better. Use your hand to make sure they are not getting too hot.

>transplanted too fast. 9 days veg time is nothing.

>you should not foliar feed. It should not be necessary with nutes in the soil. Its permanent so if you use too much you cant just flush it out like in the soil.

>no fertillizer should be applied at seeding. Only start when true leaves have formed and not cotyledons.

>ocean forest soil I believe contains lime and then you added about 1 tablespoon per gallon dolomite to it. Have you checked what ph this got you? Directions are below in my signature.

>ocean forest is enriched with alot of nutrients. You should not have to add anything in the water for some time. How long you wait is a good question.

>Soil looks wet. Are you letting them go dry some between waterings?

 

[Erin Kerrik]

> Lights need to be closer than 30". Maybe 15" (38cm) would be better. Use your hand to make sure they are not getting too hot.

78 in the shade with lights on.

>transplanted too fast. 9 days veg time is nothing.

>no fertillizer should be applied at seeding. Only start when true leaves have formed and not cotyledons.

At 9 days the rockwool went into soil, wanted to make that clear. I did start with a bit of 5-5-1 in the rockwool - using the FF schedule as a guide - which has a bit of bloom fertilizer for seeds: http://foxfarmfertilizer.com/feedingfox.html ... so put 1/3 the suggested strength.

> Have you checked what ph this got you? Directions are below in my signature.

Runoff was between 6.2 - 7.7.

>ocean forest is enriched with alot of nutrients. You should not have to add anything in the water for some time. How long you wait is a good question.

Maybe this will be clearer when they've been fed:

8/21: Wet rockwool w/ 6.0 R/0 water w/ 1/2 tsp. SuperTea 5-5-1 per 1/2 gallon.

8/30: All sprouts had first true leaves, the GF and C99 had lots roots growing out the bottom of the cubes, the WW had some. Some of the cotyledons were yellowing. Put cubes in 1 gal of soil mix described and watered w/6/0 R/) water.

9/05: Fed 1 gallon R/0 water 6.0: 2 tsp Big Bloom (1/3 recommended strength), 1 tsp B'Cuzz Root Stimulator (full strength) adjusted to 6.0 pH. Runoff was between 6 and 7 pH.

My intention is to alternate nutes - plain water/FF nutes/Plain water/B'Cuzzs nutes.

>Soil looks wet. Are you letting them go dry some between waterings?

Yes, although I use the "lift the pot" method and am not used to all the perlite/vermiculite. Prolly could have waited a few more days before the second watering.

Thanks!

 

[sproutco]

I think its just old fashioned fertilizer burn.

 

[Erin Kerrik]

I think its just old fashioned fertilizer burn.

I trend to agree ... everything looks healthy other than the few areas. Surprised a few drops of 2-0.2-7 Fixh-Mix per liter was enough to overfeed them.

 

[Guest]

why are you feeding bloom nutes to seedlings? its not just the fish mix, and I doubt thats what caused the burn - sounds like the big bloom did it.

 

[MynameStitch]

ooks like you have started a hobby without researching it properly first mate.

this is not the first time this person has posted here needing help

we tryed to tell her about her plants last time and it tlook alot to convice

nute burn this time around is what you got

 

[Erin Kerrik]

why are you feeding bloom nutes to seedlings? its not just the fish mix, and I doubt thats what caused the burn - sounds like the big bloom did it.

Because it says to on the FF schedule and P&K are apparantly needed root development. http://foxfarmfertilizer.com/feedingfox.html

 

[Erin Kerrik]

this is not the first time this person has posted here needing help

we tryed to tell her about her plants last time and it tlook alot to convice

nute burn this time around is what you got

Thanks for the help, and I am sure you know newbies are going to make mistakes.

FWIW, not sure if this was what appeared to be a simple N deficiency last time, but there was a fungus gnat infestation that became apparent a week later, and when uprooting the roots of one plant, the roots were pretty much gone. Still got a nice half oz of BB and a little over an oz of schwag from the bagseed sativa.

 

[dre86]

I trend to agree ... everything looks healthy other than the few areas. Surprised a few drops of 2-0.2-7 Fixh-Mix per liter was enough to overfeed them.

K 7 is quite strong for such young plants under fluoro light btw: do you mist/spray the plants?

 

[sproutco]

I don't think ocean forest enriched soil makes for good seed starting. Too many nutrients at a young age. Plus, using this soil leaves you guessing as to when more nutrients need to be added. Better to start them off in something like promix soilless mix with no long term nutrients. You then have full control over what you are feeding them in the water. If your going to follow a feeding schedule with liquid ferts, this would be another reason to get non-enriched soil. Adding vermiculite to indoor plants soil mix will make the soil too wet. Better to leave it out and just lighten the mix with perlite. Good luck.

 

[Guest]

while I respect your opinion 100% sproutco, I totally disagree about ocean forest. I find it to be perfect for seedlings. it has just enough nutes to get them through the seedling stage. the cotydelons dont yellow untill it is big enough to survive and appreciate being fed. ive never seen or heard of it causing burn, and they say with true organics in dirt its harder to burn.

that being said I understand your desire to have full control over whats being given to them, but the fact is, when using OF you do too. cause you had control over you using OF and you can read whats in it before ya use it, and then choose whether or not to add other organic supplements (bone meal, guano, kelp, etc), or just to rely on liquid nutrients..


ya cant blame this one on OF - its definitely the bloom nutes imo

 

[Erin Kerrik]

K 7 is quite strong for such young plants under fluoro light btw: do you mist/spray the plants?

The plants were under a HID w/two sets of true leaves when I misted them 3-4 times with the really weak fish-mix. I'd previously misted with a Safer brand insecticide to prevent reinfestation of fungus gnats and have since sprayed them with Serenade Disease Control as a bad fungus preventative.

 

[Erin Kerrik]

Adding vermiculite to indoor plants soil mix will make the soil too wet. Better to leave it out and just lighten the mix with perlite. Good luck.

I've already noticed the mix dries out really slow - was generally following two recipes from this board ... will know better next time and save the vermiculite for use with salad greens.

 

[Erin Kerrik]

ya cant blame this one on OF - its definitely the bloom nutes imo

Big Bloom? It's .01-0.3-0.7 and I used it at 1/3 strength. My guess is that OF is just hot enough and the small amount of N from the Fish-Mix and SuperTea 5-5-1 in the rockwool that pushed them a bit too far.

Everything is going nicely otherwise, all seedlings just starting their third set of leaves, some of them starting their fourth ... plus side nodes starting on the C99s and GFs.

 

[sproutco]

I've already noticed the mix dries out really slow - was generally following two recipes from this board ... will know better next time and save the vermiculite for use with salad greens.

:smile: