Where do I find limestone for my plants?

Hey! So, i'm growing nasturtium as a project for one of my class, and I was wondering if there was any local places near San Francisco where I can buy it. It's fine if the location is about an hour or two driving time. It would also be great to tell me where to buy nasturtium.





And...please don't just say "A local florist." because that doesn't help. There are a lot of florists, and not all of them have nasturtium or limestone.





Thanks a bunch!

Where do I find limestone for my plants?
Are you sure you need it? If this is a container plant for a school project, and you're using potting soil, things should be pretty well balanced. One uses lime to add calcium and/or magnesium to a soil, and to correct an acid pH. Acidity is easy enough to test for with a home meter or pH strips, but low calcium would need a soil test.





There are two kinds of lime available, and what you get depends on your problem. If you have heavy clay soil, it is probably way high in magnesium and needs calcium in balance. In that case, DO NOT use dolomitic lime, because it contains magnesium and will only make matters worse. Use high-calcium lime. Unfortunately, the lime you can get at almost any garden center or home improvement store is dolomitic lime. In your part of the world Peaceful Valley Farm Supply will have the hi-calc. lime; they're on the Net.





If your pH is 6.7 or higher and you still need calcium, don't use lime at all, use gypsum.
Reply:try a feed store, they usualy carry it,
Reply:home depot and most gardening stores sell pelletized lime.
Reply:It will be hard to find the small amount that you need, limestone normally comes in 40 pound bags. However it is cheap so you might buy a bag anyway. Look in the phone book for "farm and garden supplies" to find a place near you. Walmart has that stuff also.
Reply:I got my limestone from Home Depot.


I've also seen it at WalMarts, too.
Reply:I don't know where you can buy limestone near SF but you might check your local lawn a garden departments or hardware stores for nasturtium seeds. I have grown a lot of it from seed here in MO because we are nothing but limestone in this state. There are a couple of tricks to growing it from seed: You need to use a nail file and file the outer brown shell away in a small area...just a small nick to make the white part that is underneath show. Then soak the seeds in warm water overnight. When you plant, plant the filed away place facing up.
Reply:I am not sure how far Yamagammis is form where you are but they are a full service nursery near the bay area( I think San Jose) They would have all your gardening needs.


www.yamagamisnursery.com/welcometoyama...





another one worth considering is Almaden Valley Nursery


http://www.almadenvalleynursery.com





both are highly regarded nurseries and worth a stop by, I went thier on a nursery tour many years back, it was suberb.