Location: Moist Midwest - 6b
Joined: Thu Dec 23, 2021 3:18 am
BE WARNED: Gibberrelic acid is a plant growth-regulating hormone, and while very useful in getting quick germination out of seeds when used correctly, it can also severely stunt or kill seeds and seedlings if used improperly. Do the research to determine in what concentration of GA3 solution and for how long you should soak your seeds.
With the recent addition of some wonderful Petiolaris-complex drosera seeds to the seedbank, and any Byblis seeds (liniflora excepted) that might find their way into the seedbank in the next couple months, there may be a want for a little bit of GA3 here and there without heading to eBay to buy a 10g bag of sketchy white powder that may or may not actually be the genuine article.
By default I'll send 1/64 tsp (about 0.07 ml, or ~100 mg) in a microcentrifuge tube by snail mail, (which is enough to make about 2 cups of 200ppm solution, or just under 1/2 cup of 1000 ppm solution) - however if you want more just ask. Precedence will be given to people will be given first to people with appropriate seeds from the seed bank (or a request for appropriate seeds in the process of being fulfilled), then to those with appropriate seeds from elsewhere.
For easy reference, here are some instructions for how to make a 270 ppm GA3 solution, which I use to soak annual Byblis (other than liniflora) seeds in for 5 days. These instructions are for use with 1/64 tsp (0.07 ml, ~100 mg) of GA3. For other concentrations or amounts, use the attached table to determine required amount of GA3 and water. Note that TDS meters will not work to determine the ppm concentration of GA3, instead you may have to use... math!
You will need to provide:
- Low-TDS water (1¾ cups)
- Isopropyl alcohol (several drops)
- Dish soap (1 drop, optional)
- Paper towel
- Potting media and pot
- Pour 1¾ cups of low-TDS water into a glass or other container
- Drop several drops of isopropyl alcohol into the GA3 tube until the powder is dissolved
- Pour the GA3/isopropyl liquid into the water. I recommend submerging the whole tube to get it all out. Optionally, add a drop of dish soap.
- Stir. Now you have a ~270 ppm GA3 solution.
- Carefully fold your seeds into a small paper towel, making them secure.
- Place the towel into the GA3 solution, and leave there for 4-5 days. The paper towel should have some slight black staining.
- After 5 days, remove the paper towel from the GA3 solution and gently soak in low-TDS water momentarily to wash off any remaining GA3
- Sow the seeds.