GangaDownUnder
Well-Known Member
Cheers. That's the way to check it seems. Unfortunately I don't have sulfuric acid lying around haha
Feminizing Seed Spray - Advice?
- Thread starter GangaDownUnder
- Start date
GangaDownUnder
Well-Known Member
I just took PPM reading from them and there is definitely a lot of something in there.
Part A Silver Nitrate was 484PPM
Part B Sodium Thiosulfate was 4520PPM
So its in there and didn't work for some other reason, or there is something else in there (which seems unlikely).
Part A Silver Nitrate was 484PPM
Part B Sodium Thiosulfate was 4520PPM
So its in there and didn't work for some other reason, or there is something else in there (which seems unlikely).
TerryTeacosy
Well-Known Member
I searched Bunnings for availability of Sulphuric Acid for you, but just got generic "acid" results. You could try trawling through the results of a similar search. 'Pretty sure I've seen it somewhere in the big green shed.
Failing that, chemical/lab supply mobs would have it, but it might not be a mail-order thing as it would be considered DG.
Good luck!
OldMedUser
Well-Known Member
Boron, like zinc, is an often overlooked micro-nutrient imo but I didn't know it was related to the viability of the pollen. I'll add a bit of both during veg and flowering periods just to make sure they get some at all. A little selenium as well.
Interesting.
OldMedUser
Well-Known Member
The two parts should last for a long time until mixed to produce the final STS. I made up two 500ml brown bottles of each back on Jan. 29 /20 and still use it. I'll mix up a 500ml bottle of STS for spraying and that's about enough for one run so start with a fresh mix for each. I'm spraying a couple of Cherry Noir plants right now and they just got their 2nd spray last night. These were plants I had out in the wife's greenhouse and started flowering on their own a few weeks ago so hopefully they work. Each plant is from a different mother so I want to cross them and make S1 seeds with each.
I've doubled up on the amount I use when I mix the STS and still don't see any real damage being done to the leaves like some I've seen posted. I add a few drops of blue Dawn dish soap to the STS so it sticks a bit better. I also got one of those pump-up sprayers made for BBQs. Has a nozzle like a spray paint can and seems to spray much finer droplets tho I have no idea if it makes any difference.
7/7 plants I've sprayed all gave good pollen.
OldMedUser
Well-Known Member
Battery acid is sulfuric and can be got at auto supply stores or pop the top off a car battery and suck a little out. The lead contamination shouldn't affect the test. Could just put a little of the silver nitrate sol'n on your skin and it should turn black. It's pretty dilute tho so may not react with skin enough.
