If you want to send flowers for Mother's Day, of course I would always recommend supporting your local florist, but if you're far-away and don't know the local florists where your mother lives, I would recommend Organic Bouquet. Not only do they make lovely arrangements, but they are less likely to send your mother flowers soaked in pesticides and fungicides, so...yay! Also, they will donate part of the proceeds from any of their Flowers for Good collection to charity, so...yay again!
I have used Organic Bouquet in the past and always been very happy with the results. I've sent flowers to my mom for her birthday and Mother's Day, and she always sends me pictures of the bouquets. So, although I don't have any personal experience with the products, I still feel pretty good about recommending them.
If you need to get flowers to someone
And, finally, if you need flowers delivered to someone on O'ahu, Rainforest at Kilohana Square makes beautiful arrangements. I'm not sure if they ship arrangements to the mainland, but you can get a lei shipped to the mainland. Their web site is a little detail-heavy, but they are trying to make sure they give their customers all the information they might need when considering an order. If you want to actually place an order, the best way is probably to call and talk to them. You can't just click on a picture and say, "Send one of these." Each creation is unique and depends on customer need and floral availability. I've never dealt with their delivery service, but I have picked up a sympathy arrangement (cat not included) and some loose flowers for my own arrangement at home.
I'm not getting any kick-backs or anything for any of these endorsements. These are just companies that I have had good results with in the past. I want to get the word out so that my readers have some reliable places to turn to, and I want to do my part to support the businesses that I like.