Robin has a very interesting tip about germinating old seed using bleach, something I have yet to try.
Now that you've seen my seed stash, you can understand why I am always looking for ways to germinate old seed. Over the years I have picked up some tips and have had good success.
1, I soak the seeds in a very weak fertilizer solution that is high in nitrates. They are soaked no longer than 12 hours. the nitrates help to start the process of breaking down the seed coat. I don't soak seed that is smaller than carrot seed.
2. The coffee filters that I place them on are dipped into a solution of week tea with a few drops of hydrogen peroxide. The tea provides some protection from fungus, and the hydrogen peroxide adds some oxygen to aid germination.
3. The filters are then placed into a small plastic bag and then placed in warm location.
4. Once I see the first sign of roots, those seeds are planted and the rest checked twice per day.
5. Some seeds last much longer than others. I am still getting good germination from tomato seed purchased in 1999.
I use 9oz styrofaom cups and add 3 to 4 drops of a liquid fertilizer for the initial soaking. When the filters are soaked I use the same 9oz cup and add a weal tea solution with 5 to 6 drops of hydrogen peroxide.
This method is not fool proof, but I am able to germinate a good amount of seed between 5 and 10 years old.
This year I've had success with 6 year old spinach, 7 year old Swiss chard and pea and 8 year old beet as well as 13 year old tomato seed. My seeds are kept in a cool basement room, no special conditions.
If you have some old seed that you want to still grow give this method or Robin's method a try. I'm going to give Robin's method a try!
Ed, I'm going to copy your method. It's always good to know more then one way to skin a cat!
ReplyDeleteRobin, that's why I was happy to see your post. I have some very stubborn and some very old seed I'm going to try your method on.
DeleteGermination off of 13 year old tomato seeds, that is quite impressive!
ReplyDeleteKris, tomato seeds can last a very long time. these are seeds I got from the Seed Savers Exchange in 1999.
DeleteThank you so much for this wonderful post. I am going to print it out. I have a lot of seeds that are about 5 years old that I am going to try this on. I can not wait to see what sprouts!
ReplyDeleteChristy, you should have no problems with 5 year old seed. I find I still get good germination with almost everything at that age.
DeleteWow great suggestions. I have quite a collection of older seed. Can't wait to try this out.
ReplyDelete