Mary, if you can't find 20-20-20, just look for any "balanced" fertilizer -- 10-10-10 is always on sale at our local feed store (usually called "triple 10"). Even better, or in combination with the chemical fertilizer, is some good compost !
I had a great day today -- our temp finally went into the low 70s and I was able to spend most of the day outside, marking out my garden for planting, marking where to plant some hazelnut bushes and cherry trees (DH can do the digging for those!), and doing some general cleanup that never got done last fall -- LOTS more of that to do, the fall was so wet that it was impossible to work outside. I'm SO out of shape for gardening -- feels great to have my muscles complaining about it again!!