# Citric acid to aid seed germination

katskan41December 13, 2010

Hello all. I've read a few articles about using citric acid to help germinate seeds with hard seed coats, like junipers. Directions I've read say to use a "10,000 ppm soak of citric acid for 96 hours" but they don't say how much citric acid to mix with water to get this 10,000 ppm solution.

Can anyone help with this?

Thanks

Thank you for reporting this comment. Undo
art33(6)

Hi Katskan,

Well, I'd say you need about one and one third ounces of citric acid to a gallon of water. Here's the way I figured it:

One US gallon of water weighs about 8.345 pounds (depending on the temperature).

So:

A) 1 PPM = 8.345 pounds per million gallons of water.

B) Converting to ounces: 1 PPM = 133.52 ounces per million gallons of water.

C) Bringing it down to one gallon: 1 PPM = .00013352 ounces per gallon.

D) Going from 1 PPM to 10,000 PPM: 10,000 PPM = 1.3352 ounces per gallon.

Hope this helps.

December 13, 2010 at 6:53PM
Thank you for reporting this comment. Undo
katskan41

Hello Art and thanks for the fast reply. Much appreciated.

So if I understand your calculations, I'd need roughly 3 US tablespoons of citric acid powder per US gallon of water to make the 10,000 PPM solution. Sound about right?

Thanks again.

December 13, 2010 at 7:19PM
Thank you for reporting this comment. Undo
art33(6)

Of course, to be perfectly accurate, it would depend on how much a tablespoon full of citric acid weighed. However, I'm sure the 3 tablespoons would be pretty close; that's probably what I'd use.

December 13, 2010 at 9:06PM
Thank you for reporting this comment. Undo
katskan41

Thanks very much Art. Although the 3 tablespoons of citric acid per gallon of water might not be exactly 10,000 PPM I think it should be close enough for use on seeds with very hard seed coats.

December 14, 2010 at 6:23AM
Thank you for reporting this comment. Undo
alameda/zone 8

I just heard about citric acid soak for germination for seeds. On the container, it says for sprouting seeds. My friend tried it on some almost impossible to germinate silky camellias and the seeds are germinating about 2 days. I would like to try it on some daylily seeds - has anyone ever soaked daylily seeds in this? Can anyone provide other information on this? I normally soak mine in a hydrogen peroxide/distilled water mix. Thanks for any advice......

September 1, 2012 at 10:15PM
More Discussions
Question on sowing seed indoors using starter kit
Hi Everyone - I'm a noob gardener and am attempting...
sistereinstein (Z5a WI)
Volunteer in my seedling tray?
Can anyone identify this seedling? I have one in both...
blg002
Crock pot as a "heating pad"
marigold.mary
Germination time for Lily of the Valley started indoors
As a newbie, this is my first year starting plants...
SnowStorm
Need Help Starting Seedlings
Hi!! My name is Sunny. :) I joined your forum just...
sunnygirl55
First Snowfall Gel Hand Wash
\$2.49 | zulily
Carbonator Bottle Kit
\$37.99 | zulily
40-Oz. Automatic Dishwasher Gel
\$5.99 | zulily
Australian White Grapefruit Liquid Hand Soap - Set of Four
\$39.99 | zulily
24-Oz. Hummingbird Nectar Powder
\$7.99 | zulily
Lemon Verbena Hand Care Set
\$24.99 | zulily
26-Oz. Bathroom Cleaner
\$5.99 | zulily
Original Fig Liquid Hand Soap - Set of Four
\$39.99 | zulily
© 2015 Houzz Inc. Houzz® The new way to design your home™