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With just a little planning, gardeners can get jump on the
planting season by starting seeds indoors. It's easy, once you have decided what
you are going to grow from seed. The back of most seed packets will provide you
with basic information: how long the seed will take to germinate and an estimate
of how long to grow the plant indoors before transplanting into the garden. Find
out the average safe date for transplanting in your area, and count backwards to
find out when to start your seeds. Take time to consider how you are going to
provide the required warmth, humidity and strong light to your seed starting
project. Check for information on whether the seeds need light or dark (a few
seeds have specific requirements). Before using any pots, trays or tools you
have used before, wash them with a solution of one part household bleach to nine
parts water.
• Containers: Don't worry too much about the pots you use for
your seedlings, as long as they are clean and provide good drainage. There are
many very handy seed starting trays and pots available, made from plastic, clay,
paper and peat. Another option is Jiffy 7 Peat Pellets. These are made of
compressed peat in a mesh bag that expands when soaked with water to form both a
plantable pot and the planting medium.
• Planting Medium: The medium is extremely important. For
good germination, seeds will do best when planted in a light, spongy mixture
that has good moisture retention and is well drained. Using a
sterile growing medium such as vermiculite or a peat-based seed starting mixture
will minimize disease problems. Wet your seeding medium and allow it to drain
before sowing the seeds into it. Watering over the top can dislodge seeds.
• Germination: When it germinates, a seed will send up a
sprout with two seed leaves. It is important to wait for the next set of leaves
to develop before disturbing the seedling, because seed leaves are not true
leaves. They are called cotyledons. Take care when handling tender young
seedlings - they can be damaged easily.
• A One-Step Method: Sow two or three seeds at the
appropriate depth in each individual container. After the seeds germinate and
the seedlings begin to form true leaves, pinch off the smallest seedlings,
leaving only the most vigorous plant in each container. Continue to care for the
remaining plant until time to transplant to the garden.
• A Two-Step Method: Sow the seeds thinly at the appropriate
depth in a tray or other container filled with planting medium. Cover the seeds
with fine Perlite or vermiculite to help keep them evenly moist. When the seeds
germinate and develop their first set of true leaves, transplant the seedlings
into containers with more growing room.
• After Sowing the Seeds: Seeds generally need a soil
temperature between 65° and 75°F to germinate. If you have trouble maintaining
that temperature, consider using a heating mat or cable. Covering your
containers with plastic will help hold in moisture and create a humid
environment. Be careful not to let them get too hot under the plastic,
especially if you have the containers in a sunny area or under a warm light.
Remove the plastic as soon as you see any signs of germination. Keep the
planting medium evenly moist, using lukewarm water if possible. Water from below
to avoid disturbing the tender seedlings.
• Lighting: Seeds may not need strong light to germinate, but
it is essential as soon as true leaves have developed. Some gardeners prefer to
place the seeded containers under lights immediately after sowing so that they
won't have to worry about moving them when they begin to germinate. There
several plant lights available that do a good job. Fluorescent lights provide
strong, cool, inexpensive light to plants.
Plain fluorescent bulbs are adequate when starting seeds; however, it is a good
idea to use at least one ‘grow light’ tube if you are going to keep the
plants under lights for any extended period of time. It is difficult to provide
enough light with incandescent bulbs without overheating the seedlings. As soon
as the seeds begin to germinate, keep the lights on 16 hours a day, and
gradually decrease the time to 12 hours a day as the seedlings mature. Keep the
light fixture about 4-6 inches above the plants, adjusting the height as the
plants grow. To insure strong, sturdy plants, keep the light within 12 inches.
Seedlings not receiving enough light quickly become weak and leggy.
• Fertilizing: Begin fertilizing seedlings when the first
true leaves develop. Provide a weekly feeding with a fertilizer.
Continue feeding the seedlings the half-strength fertilizer solution until they
have been transplanted. Remember, you are their only source of food.
• Transplanting: Don't move plants to the garden too quickly.
Even cold-tolerant varieties need to be hardened off. ‘Hardening off’ is a
process of acclimating plants to the light, humidity and temperatures found
outdoors. Begin by placing the plants outdoors in a sheltered area out of direct
sunlight for a couple of hours the first day. Gradually increase the time spent
outside over the next 5-7 days before transplanting the seedlings into the
garden. With a few notable exceptions such as tomatoes, most seedlings want to
be planted at the same level at which they were grown in their pot. If you are
using peat pots, be sure the rims don't stick up above the soil surface or they
will act as wicks, drawing water out of the ground.
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Easy
From Seed
Vegetables
| Beans |
Carrots
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Okra
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Radishes
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Beets
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Corn
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Onions
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Spinach
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Broccoli
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Cucumbers
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Peas
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Tomatoes
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Cabbage
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Lettuce
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Peppers
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Zucchini
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Cauliflower
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Melons
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Pumpkins
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Squash
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Herbs
| Basil |
Chives
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Fennel
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Parsley
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Chamomile
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Cilantro/Coriander
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Marjoram
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Sage
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Chervil
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Dill
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Oregano
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Thyme
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Perennials
| Campanula |
Foxglove
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Hollyhocks
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Veronicastrum
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Columbine
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Echinacea
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Oriental Poppies
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Viola
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Coreopsis
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Gaillardia
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Physalis
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Yarrow
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Dianthus
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Heuchera
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Rudbeckia
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Annuals
| Amaranth |
Cleome
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Marigolds
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Sweet Alyssum
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Asters
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Coleus
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Morning Glory
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Sweet Peas
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Bachelor Buttons
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Cosmos
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Moss Rose
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Sunflowers
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Browallia
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Dianthus
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Nasturtiums
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Zinnias
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Calendula
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Four O’Clocks
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Petunias
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Celosia
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Seed Geraniums
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Sunflowers
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