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.
Starting seeds indoors six to eight weeks before the average last spring frost date, or directly sowing them in the garden after the last frost date once soil temperatures reach 60 F or warmer will produce seedlings. A temperature range of 65 to 75 F is best for tomato plant growth. When temperatures drop below this range, growth slows. Tomatoes will grow in temperatures warmer than 75 F, but you'll need to water more often to prevent wilting.