The
first step to starting seeds indoors is to find the last frost date for
the local area. There are handy maps online to locate the
last frost date. The last spring frost date is important because the timing to start seeds indoors depends on this date.
When to Start Seeds Indoors
Some
seeds are started indoors 4, 6, or 8 weeks before to the last frost
date, depending on the type of seed.The seeds are then transplanted
outdoors after the last frost date has passed and danger of freezing has
passed in that area.
- Garden seeds started 4 weeks before the last frost date include: cucumbers, endive, and lettuce.
- Garden
seeds started 6 weeks before the last frost date include: broccoli,
brussel sprouts, cabbage, cauliflower, celery, and kale.
- Garden seeds started 8 weeks before the last frost date include: eggplant, leek, onions, parsley, peppers and tomatoes.
Garden
seeds are often started indoors to get a head start on the growing
season. The plants are weeks old before the danger of frost has passed.
But, not all garden seeds should be started indoors. Some garden seeds,
such as beans, peas, radishes, corn and spinach prefer to be directly
sown into the garden soil. Reading the back of the seed package will
also give you specific information on when the vegetable seeds can be
started.
How to Start Seeds Indoors
Garden seeds can be
purchased at most retail stores in the spring. Organic and heirloom
seeds are available online and at organic grocery stores or health food
stores. In addition to buying gardening seeds, experienced gardeners
often save seeds from the fruit of the last crop and store these seeds
throughout the winter to use in next year's garden.
Vegetable
seeds are usually started in flats or peat pots purchased from the
store. In addition to starting them in purchased flats, environmentally
conscious gardeners may want to consider reusing household items to
start seeds. Some common household items that work wonderfully are used
egg cartons, yogurt containers, or paper rolls.
Fill the
containers for starting the seeds with soil. The soil can be specialized
soil for starting seeds, or composted soil. Leave 3/4 inch of space at
the top of the container. Dampen the soil with water. Press the seed
into the dampened soil the depth recommended on the seed package. Most
seeds should be planted on the soil surface to 1/2 inch below the soil
surface, depending on the type. Lettuce and tomatoes, for example, are
planted 1/8 of an inch below the soil surface. Do not push the garden
seeds too deep into the soil.
Place the planted seeds in a sunny
window. The seeds can be covered with plastic wrap or a sheet of glass
to maintain humidity while the seeds germinate. Keep the soil moist, but
not soggy. The seeds should be stored in a sunny window. If enough
sunlight isn't available fluorescent lighting can be used to help
germinate the seed. In a week or two, depending on the type of garden
seed, a small plant will begin to emerge. Thin the seedlings as they
grow and transplant them outside to the garden after the last frost date
has passed.