Is it too late to send to Spring Traing Addresses?

When is it time to send to the stadiums for the season?

These are the players I was going to send to:
Dustin Pedroia
Curtis Granderson
Chone Figgins
Phil Hughes
Jared Weaver
Joe Borowski

It would be risky. Other than a few cards and stamps you don't have a lot to loose, but I would probably not send any more ST requests.

I am sending out 7 more c/o spring training tomorrow.
It's not to late to send, Ive had many successes in march
I sent to Pedroia and Hughes before they reported and I'm still waiting but Ive heard they have been signing so its definitely worth a shot.
Granderson I just got yesterday so good luck!

I think that I am going to take a shot with Borowski and Weaver

If I were you I would take your shot with Hughes now, he has been signing in ST. He seems to stop once the season starts. Take your shot now, worse case is it doesn't get signed, not such a great case you get it sent back next year, best case you get what you asked for.