Cat grass is usually oats, so I suppose any place that sells oats either for cover cropping or grain growing would work. I bought a few pounds from Johnny's last year. I'm not too sure about your mini garden kits, I mean how you would go about making mini packets for all those different seeds. For our wedding we had packets of marigold seeds with our names and our wedding date and some message like "happily ever after" or something similar. My Mom ordered those from Pinetree seeds. They do tend to make smaller packets of seeds, so maybe contact them and tell them what you are thinking. Good luck and congrats!

There's a thread around here on making endless seed packets. I plan on using old garden catalogs and make up a huuuuuge pile of those. I figure if I start making up a bunch of them now, I should have enough by next year, lol.
And teehee, this idea also gives me something to do with the random handfulls of jars and tins I have saved up.

And thanks for the heads up on the oats. We have a local farm and feed shop that sells that kind of stuff in bulk :)

And Pinetree, my favorite seed source. Yep, been in contact with them about some wedding plan action too. I asked them about if it's possible to make up some sort of wishlist or registry option, and the gal said she would talk to IT and get back to me :) I'm going to be ordering a few of their mixed seed packets for the wedding favors.

Whole grain oats, wheat, rye, or barley all will sprout into "cat grass". Any good farm and feed store or organic market should have viable grain by the pound, and its generally very, very cheap.

Craft stores carry small plastic bags of various sizes in their jewelry making area that I use to repackage small amounts of seeds for trading. Avery self stick labels can be hand lettered or run through a printer and attached to the small flat bags. This might be a quick way for you to repackage bulk seed. But with all the varieties you are mentioning it will take A LOT of time and repackaging if everything is bagged individually. Could some of them be combo bags?

Another easy-to-grow-from-seed flower to consider is zinnia. Two varieties we had when my daughter was married were both white zinnias......Purity and White Wedding, good names for a wedding theme. We purchased them from Burpee in small packs to grow for flower arrangements at the wedding. I'm not sure if they are available in bulk at a more reasonable price for making seed packs.

You might want to print up a page of what you're giving them, when it's best to plant them, etc.

Has anyone suggested seed bombs?

If my boyfriend ever proposes, I want to do those.

Here is a link that might be useful: Seed bombs

Being a vege gardener, I don't want a bunch of different seeds willy nilly to toss about! Different veges require different help!
You might want to offer a mess of wildflowers or things to surround your garden like marigolds/basil/nastursiums!
Just a suggestion! Nancy

If I were going to package them myself, I would go to Swallowtail Garden Seed for the flowers (bulk seed area), and start at Willhite Seed for the vegetables.

Thanks for the suggestions folks :)

I do plan on printing up a basic set of instructions. And the envelope thing isn't too rough, I can make up around 50 of them in an hour. And since we are hopefully going to keep the guest list to around 25 or so, that isn't too many jars to pack up with seeds.
I want to do garden in a jar because I'm asked fairly often what I'm putting in my garden and where do I get my seed from? Thought it would be a nice way to share that with my friends. These seeds aren't going to be thrown around I hope- I hope they take them home and plant them. Most of them either already garden or are looking to get more into gardening, so I thought this would work :)

Seed bombs- yep, those are playing into the wedding too. I'm making wildflower seed loaded paper bits for people to throw in the wildflower field where we are planting a tree for the unification part of the ceremony.

Check out The Garden Hoard website for 6 packs of free seeds per month for just a SASE.

If you are getting married in May, I would leave out the pepper and tomato seeds. Those need to be started too far in advance to useful to your guests. You could always start tomatoes and use them as centerpieces with a ribbon around a cheap pot. Herbs would also make nice centerpieces that couples could take home with themselves. Start growing them this year and next year you can divide them. Another option would be to include herbs and their lore that relates to love, weddings, or honeymoons. Flower seeds could be selected based upon what those flowers were once thought to represent/symbolize.