A Spa Day with you or one of her friends/Mom/Sister
Some potted flowers that can be planted in the garden along with a card with a Gift Certificate for a Manicure/Pedicure.
Bath oils/fragrances a loufa and candles.
A few really nice quality flower pots, potting soil and seeds for her favorite herbs or flowers.
A casual/fashion watch.
A nice set of gardening hand tools and gloves.