you certainly can grow lemons in Maryland - grow them indoors - right in your home - via Dwarf Fruit Trees of the Meyer lemon variety.
Dwarf Meyer Lemon Trees are evergreen so they'll look beautiful in your living room or other sunny spot in your house. If you want them outside for spring summer and early fall you can put them in a pot/container that is easy for you to move and just bring them indoors for the winter. You'll have a beautiful bit of greenery inside and gorgeous fruit. Dwarf fruit is often better than full grown tree fruit.
You'll also be showing everyone who comes to your home that it's possible to have beautiful and practical food growing right at home - a super conversation starter and inspiration for self-reliance of all kinds.
Nothing makes an impact better than what has it's own life and growth.
