Found 3 active deals in Special Occasion.
Living Social offers a $30 ProFlowers Credit for $15. Coupon code "MEMDAY" cuts it to $12. That's $18 off and the best price we could find, although we saw it for $5 less last month. It can be used towards shipping (which starts at $12.99), and the entire credit must be used on a single order by August 10. Deal ends May 25.
1-800-Baskets cuts 30% off a selection of Mother's Day baskets and gifts via coupon code "18MDAY30". Shipping starts at $14.98. A couple of best bets after coupon, and shipping prices for Mother's Day: