Zone 7 – when is too early?

Zone 7 – when is too early?

hey folks...i have just a couple of quick questions for you all. i live in Zone 7 (Baltimore, specfically) and it's been warm. like...highs between the 40s and 60s warm. when is too soon to start prepping the ground for boxes? we've had a bit of rain, so i keep putting it off, but the ground's definitely soft enough to start digging. also, when should i take my pomegranate outside? she's a dwarf and is living quite happily in a pot in my office, but i'd like to take her outside soon. i believe we're past the frost stage, but since she's in a pot i can bring her in should it suddenly get too cold. is it wise to just take her out now and get her some fresh air, and see how she does? thanks!
Happy Labor Day

Happy Labor Day

1st time posting my room

1st time posting my room

mayapple, maybe??

mayapple, maybe??

Mini Rose Plant

Mini Rose Plant

Dahlias!

Dahlias!

Greetings from Your Friends at This Old House

Greetings from Your Friends at This Old House