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[olyd88]

I bought 10 grams of GA3 tablet(water soluble) from a local store recently. It has 10% GA3 , 6% Ca, 3% B for 1 tablet. The problem is it has only 10%!! of GA3 and i dont know how good is it for seeds germination. I asked them but they dont have 90%GA3 at the moment, so i guess i want to try this water soluble tablet first and see the result. Could anyone suggest or give me advice with this?

I heard many people are using 90% GA3 for seeds germination, root enhancement, fruit, etc, but some people are also using as lowest to 10% GA3 for seeds germination etc. Some online store also has a product with only 20% GA3 but in tablet. I heard many people have a success with 90%GA3, so now with 10% GA3 tablet, i have to use 9 tablet to get equal result with 1g 90%GA3 right?

[Caium]

I think the important thing is the concentration of ga3 into the water, people usually work with 500ppm.
From what I know, 0,5g of pure ga3 dissolved into 1L dist water is about 500ppm, the same as 5g of 10% ga3.
If you got 10g of it, you can make 2l at 500ppm.

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[olyd88]

I think the important thing is the concentration of ga3 into the water, people usually work with 500ppm.
From what I know, 0,5g of pure ga3 dissolved into 1L dist water is about 1000ppm, the same as 5g of 10% ga3.
If you got 10g of it, you can make 4l at 500ppm.

Do you think this is more or less efficient for hardy like P.viridis seeds?

[Mandrake]

Do you think this is more or less efficient for hardy like P.viridis seeds?

It's not more or less efficient, it simply requires dissolving different amounts. I'm pretty sure you will not use 10 grams of GA3, never mind if it's 5, 10 or 20%. Soaking seeds uses very little water, and 500ppm for instance is a rather high concentration.

To prepare a little 100ml vial with, say, 500 ppm GA3 solution, as odara implied, you need very little. 1 part per million means 1 mg of pure GA3 per liter of water. This equals 10 mg of 10% GA3. Multiply by 500, divide by 10 = 500 mg of 10% GA3 in 100 ml of water will give you a 500 ppm concentration, which again is quite high, and surely enough solution to give a good amount of seeds a soak.

Mandrake

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[olyd88]

Do you think this is more or less efficient for hardy like P.viridis seeds?

It's not more or less efficient, it simply requires dissolving different amounts. I'm pretty sure you will not use 10 grams of GA3, never mind if it's 5, 10 or 20%. Soaking seeds uses very little water, and 500ppm for instance is a rather high concentration.

To prepare a little 100ml vial with GA3 solution, as odara implied, you need very little. 1 part per million means 1 mg of pure GA3 per liter of water. This equals 10 mg of 10% GA3. Multiply by 500, divide by 10 = 500 mg of 10% GA3 in 100 ml of water will give you a 500 ppm concentration, which again is quite high, and surely enough solution to give a good amount of seeds a soak.

Mandrake

Thanks for the detailed input Mandrake, i  can now begin the soaking process.

[Caium]

 I'm sorry, it's 1g/l for 1000ppm.
When I said 0,5g I wanted to state 1l at 500ppm.

But for real, better keep it dry and  only make enough solution for imadiate aplication.
As Mandrake said 0,5g of 10% ga3 = 100ml at 500ppm, that will work.

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[Sunshine]

If stored properly it should stay good for a long time when mixed in solution. A lot of people mix bulk solution at a high concentration and dilute it when needed.

500ppm isn't really high imo. More mid range based off the numbers others and I use.

[olyd88]

If stored properly it should stay good for a long time when mixed in solution. A lot of people mix bulk solution at a high concentration and dilute it when needed.

500ppm isn't really high imo. More mid range based off the numbers others and I use.

I read somewhere, they recommended 750ppm for healthy grow, based on their experiments.

[Mandrake]

500ppm isn't really high imo. More mid range based off the numbers others and I use.

Yes, probably I shouldn't have called that "pretty high". It sounds high according to the amounts I've used for different seeds, but it's not objectively high. Although there's hardly objective values, since ultimately they depend on which species you're treating. Some seeds might be below the optimal concentration at 500 ppm, and others might grow stunted or etiolated or not germinate at all.

A good webpage with general GA3 info here.

Mandrake

[New Wisdom]

It really depends on the seeds.  Something like psychotria would call for a way higher ppm like 1000-1500.

And depending on how it is mixed and stored will determine how long it will stay good. 

[olyd88]

It really depends on the seeds.  Something like psychotria would call for a way higher ppm like 1000-1500.

And depending on how it is mixed and stored will determine how long it will stay good.

I think we should make an experiments especially to Psychotria species, so the result will be posted as the best recommendation rate for Psychotria sp.

[New Wisdom]

We have a GA3 results thread.  Post your findings HERE

[olyd88]

We have a GA3 results thread.  Post your findings HERE

This will take months but i will post it when i got the result.

[nobody]

The addition of Ca and B to the mix is what interests me. A 1000ppm solution prepared from those tablets will also have 600ppm Ca and 300ppm B. I wonder how the extra Ca will effect the GA3 and nutrient uptake through the seed coat.

[olyd88]

The addition of Ca and B to the mix is what interests me. A 1000ppm solution prepared from those tablets will also have 600ppm Ca and 300ppm B. I wonder how the extra Ca will effect the GA3 and nutrient uptake through the seed coat.

nanashi

Yeah, i'm currently waiting for the seeds to germinate, we'll see how the addition effect the seedling growth.