From

Location

Message

Date Posted

New Castle, Indiana

Yep I've heard all this as well. Going between 4 and 6ppm for Boron is considered borderline toxic for just about every other plant. But in the case of these AG's...they're just using it up....plus the leech out you mentioned. I started using more Borax last year but since I lost both my plants to disease I wasn't able to see the results. I know a lot of newer growers tend to go with the recommended numbers but those are all very conservative estimates by the heavy hitters.

3/23/2025 1:49:00 PM

Mill Bay, British Columbia

Dave, do you also apply the solubor in your overhead misting system or just by drip? I also upped the boron levels over the past few years but I don’t do monthly soil analysis like Dr. Chan, I guess I better get on that.

3/23/2025 3:00:57 PM

Stilwell, KS

Dave, thanks for the write up! I’ll be shooting for ~5ppm this yea. Additionally I’ve seen 1000:1 calcium:boron ratio suggested before. Would you mind sharing the solubor dosage when using drip?

3/23/2025 3:52:03 PM

Anchorage Alaska

Good info Dave ,nicely presented, I like solubar thru the drip tape as well

3/23/2025 11:07:59 PM

Indiana

Dale and Dave, How much you putting through your drip and is it every time you're watering? Good info.

3/24/2025 5:03:33 AM

Richmond, BC, Canada

My fert mixes are done in a 45 galon drum with about 40 gallons of water. About every 2 wks I add 2 tablespoons of solubor into the mix and pump it through the drip irrigation.
The following are the boron levels on the varios analysis dates.
Mar 4 1.40 initial before amendments
May 15 3.03
June 24 3.46
July 26 7.43 during this period not 1 bad thing happened
Sept 19 3.51
Oct 25 3.55
As you can see, I try for 5 but am cautious with adding solubor.It ended up being around 3.5 ppm average.

3/24/2025 2:18:27 PM

Stilwell, KS

Awesome, thanks Dave!

3/24/2025 5:31:47 PM

Torrance, Ca.

The proof is in the pudding! Once you started doing this your personal best went up well over 500 pounds!

Thanks for the chat the other day! I just sent your growing buddy up there seeds eh! :)

3/26/2025 11:58:38 PM