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.
When to Start Seeds Indoors. Provide extra protection for tomatoes plants by starting seeds indoors four to eight weeks before planting outdoors. February is a good time to sow seeds indoors. When planting indoors, use a light potting mix and plant seeds 1/2 inch deep. The seeds germinate well when kept evenly moist, warm and with six to eight hours of sunlight daily.