His first father's day is a special one. Give the new dad with a green thumb a great gardening gift that he can use with his new family or a gift he can use himself so he can relax and take some time for himself.
Gardening Journal
If the new dad in your family loves planning his garden, buy him a garden journal. These journals have spaces to write notes about his garden, places to put plant tags and a plethora of blank pages to design the garden of his dreams. He can use his journal to help him plant something new in honor of his new baby or simply for his own quiet downtime between feedings and changings.
Stepping Stone
New parents are often in awe of their baby's tiny hands and feet. Help your new dad remember just how small they were with a stepping stone kit. With these kits, he can easily make a mold of his baby's hand and then he can decorate it. After he's finished with his father-and-child masterpiece, he can place it in the garden for all to see. RedEnvelope offers a great set that can be bought as an adult and baby combination set.
Garden Tote
If he hasn't tended to his garden for a while, his tools might be rusty and worn out. Save the day by buying him a tool belt and putting in gardening tools like trowels and gardening shears. You can buy most of these products at any home supply store, but you can sometimes find sets of these already together. RedEnvelope offers a set featuring a canvas bag with the option of having his name stitched on the bag.