As a gardener, receiving a plant from a friend is always a wonderful present and even more precious if it's been home grown.
Walking around the garden after all the extremely cold weather we've had recently in northern Brittany, there is still relatively little colour in the garden apart from this rather stunning Iris reticulata - which I received last year as a gift from a gardener/designer friend in London. It was beautifully potted up with its own wooden label (a recycled lolly pop stick- an idea worth considering) which had been marked in pencil and which I planted out in the autumn. It now occupies a sheltered spot near to the house and has been in bloom now for a good couple of weeks despite the freezing temperatures. Its vivid colouring certainly brightens up the garden and definitely a spring bulb worth considering.
It's lovely to have reminders as you walk around the garden of friends and family (past and present). When we moved to France some 8 or so years ago I know the plants in my garden in Bristol, UK that I was most keen to bring with us were those that I had received as gifts - a rose ( Jacques Cartier) that I'd received as a leaving present from another gardening friend is now flourishing in our garden here and is a lovely reminder of our visits together to garden centres enjoying the odd bacon sandwich with a cup of coffee as we did.... something unfortunately that we don't get in France!
There are also many reminders of the many visits to Cornish gardens & nurseries with my Mum and Dad over the last number of years during my visits to see them when they lived down there.
Another favourite of mine is the Rose Sourire D'Orchidee which a client gave me - one they'd grown themselves from a cutting.
Why not consider something which is both easy and fun, and that is to save both cuttings and seeds to give as gifts - it doesn't take a great deal of effort but there is a lot of joy in being able to share something that you've either grown yourself or that comes from your garden.
Knowing as you wander around the garden as I love to do when time allows (normally accompanied by a mug of coffee) that different plants were given to you from different friends and family is very special.