BWI is the least expensive airport to fly into in many cases, has the MARC train from the airport to Union Station (where you can pick up metro) and is an international airport.
Tips for Growing Tomatoes Indoors. How to sow tomato seed: Fill seed trays or small pots with moist, sterilized potting mix. Drop the seeds 1 in (2.5 cm) apart over the soil. Tomato seeds need light and warmth to germinate, so cover the seeds lightly -- never more than 1/4-in (.5 cm) -- with potting medium. Water and cover. Then, spray with water until thoroughly moist. Mist as needed to keep the medium moist at all times.
Set your artificial lights (if applicable). For ideal growing conditions, expose growing tomato plants to between 16 to 18 hours of light a day. Then turn off the lights and let them sit in total darkness for about 8 hours. The plants will still grow if you are relying on sunlight, but will likely grow more slowly.