No. Once you pay and checkout, we can't add extras or make swaps or change your order in any way.
If you think you might want extra or different plants, we recommend you open up an account first - and save your choice.
Your selection is saved for seven days. When you're sure your order is complete, then you can checkout and pay.
You can also add items to a wish list, once you have an account. Then transfer them to your cart when you are ready to pay (if they are still in stock).