Jacks 321 ran out of epsoom

M

McFrosticles

Well-Known Member
As the title says, I ran out of magnesium sulphate, got the bags mixed up. I've been feeding ec 1.5/1.6. Just started week 7 of flower. Am I safe to just use 3/2/0 until I pick some salts up tomorrow? Should I drop the ec to 1.2? I have a little cal mag there, could I use this? They'll be watered twice/thrice before I can get the salts, in rockwool. Just a bit concerned as they were showing some rust spots at the serated edges, I put it down to the lights being too close but could be a little Mg def?
 
OldMedUser

OldMedUser

Well-Known Member
I would think rust spots on the edges of the leaves this late in flowering would be nute burn myself.

If old, lower fan leaves aren't starting to get yellow especially between the veins then you don't have low Mg. Even if some is happening it has to be wiping out all the old leaves before it will hurt the buds any. I wouldn't be feeding anything but water at this point myself. The tops will steal all the mobile nutes they need from the old growth.

The sulfur in the Epsom salts is good for resin production so adding some may help that.

:peace:
 
TintEastwood

TintEastwood

Well-Known Member
OldMedUser said:
Those numbers are the ppm at the stated dose rates correct?

Couldn't seem to save those using Save Image As and have it show up in Paint Shop Pro but tried Copy Image then started a new file in PSP and pasted it in then saved as a .jpg and that worked. View attachment 4350051

Good info!

:peace:
Click to expand...
Yes. Liquid or weight measure. All are for 1 gallon.

That other chart shows how Jacks formulas are high in sulfer ppm, which is good.

If in Windows. Right-click on an image for save option may work.
 
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