

Is this a spinach seedling or a weed?
This is my first time attempting a garden. Maybe 8 weeks ago, I planted some spinach seeds in this bed, but nothing happened until maybe a week ago, when I noticed this sprout coming up. The plant behind it is a young tomato plant. Is this possibly a seed I planted, or is it a weed? My backyard aside from the garden beds is pretty much sandy dirt and weeds. Zone 8b
Thanks 🙂