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Starting Plants


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Starting Plants Inside

Warm season crops need a long growing season and usually will not mature if seeded directly in the garden. Cool season crops must mature before hot weather. It is necessary, then, either to start these crops early inside or to buy plants at a garden center or greenhouse. Start seeds in plastic trays or peat pots that are 3-4 inches deep. A good soil mixture contains two parts loam, one part sand, and one part organic matter. Thoroughly mix the soil in a wheelbarrow with a shovel and sift it through a 1/4 inch mesh screen. Premixed soil mixtures are available at garden centers.

Fill the transplant tray or peat pots with the soil mixture and carefully firm the soil along the sides. After filling in the depressions, level the soil to about 1/4 inch below the top. Firm the soil evenly. Sow the seed by making a 1/4-1/2 inch hole using a dibble or pencil with a tape mark to keep the depth consistent. Sow 2-3 seeds in each tray cell or peat pot.

Start warm-season crops later than cool-season crops. Peppers and eggplant germinate slowly and should be started before tomatoes. Cover the seeds lightly with sand, screened soil, or vermiculite. Gently water the transplant trays using a fine screened waterer to prevent washing the seeds out of the soil. Cover the transplant tray or peat pots with clear plastic and keep in a warm room until germination. As soon as the seedlings appear, remove the plastic cover and keep the seedlings in full sunlight or directly under fluorescent lights. Once the seedlings emerge, thin to one plant and apply a starter fertilizer of 1 1/2 tablespoons of 5-10-5 in 1 gallon of water. Apply approximately 1/4 cup of the solution to each seedling every two weeks until transplanting. Rinse the seedlings with water after fertilizing to prevent leaf burn. "Hardening" transplants by shading them for a few days outside using either a lath house or shade cloth and slightly withholding water (but not to the point of wilting) will reduce plant growth delay after transplanting, otherwise known as "transplant shock."

Planting Dates and Distances for Garden Vegetables
Planting dates Planting distances (in inches)
Vegetable Start seed indoors Plant seed or plant outdoors Between rows, hand cultivated Between plants Depth of seeding (inches) Amount to order per 20 feet of row

"Packet" refers to average commercially-
packaged seed packet.
Asparagus April 15 - May 1
(crowns)
36 12 - 18 6 - 8 (crowns) 15 crowns
Beans, snap (bush) May 15 - July 1 18 - 24 3 - 4 1 1/2 - 2 3 - 4 oz
Beans, snap(pole) May 15 - July 1 36 4 - 6 1 1/2 - 2 2 - 3 oz
Beans, dry shell May 15 18 - 24 3 - 4 1 1/2 3 - 4 oz
Beans, lima May 15 - June 10 18 - 24 4 - 6 1 1/2 3 - 4 oz
Beets April 15 - July 1 12 - 18 2 - 4 1/2 - 1 1 packet
Broccoli March 1 - 15 April 15 or June 1 24 - 30 24 1/4 (indoors) 1 packet or
9 plants
Brussels sprouts March 1 - 15 April 15 or June 1 24 - 30 24 1/4 (indoors) 1 packet or
9 plants
Cabbage, early March 1 - 15 April 1 - May 1 24 - 30 18 1/4 (indoors) 1 packet or
12 plants
Cabbage, late April 15 - May 1 June 1 24 - 30 24 1/4 (seedbed) 1 packet or
9 plants
Cabbage, Chinese July 1 24 - 30 18 1/2 1 packet
Carrots April 15 - June 15 18 - 24 2 - 3 1/4 1 packet
Cauliflower March 1 - 15 April 15 or June 1 24 - 30 18 - 24 1/4 (indoors) 1 packet or
12 plants
Celery Feb. 15 - March 1 May 15 18 - 24 8 1/8 (indoors) 1 packet or
24 plants
Chard, Swiss
May 1 18 - 24 6 - 8 1 1 packet
Collards April 15 24 - 36 6 1/4 1 packet
Cucumbers May 1 - June 15 48 - 60 12 between single plants;
36 between hills of three
1 1 packet
Eggplant March 15 - April 1 June 1 24 - 30 24 1/4 (indoors) 1 packet or
9 plants
Endive
April 15 18 - 24 8 - 12 1/2 1 packet
Garlic
Oct. 1 - Nov. 1 18 - 24 4 - 6 3 - 4 1 lb of cloves
Horseradish April 15 - May 1 24 - 30 12 - 18 6 (roots) 18 roots
Kale
April 15 - July 15 18 - 24 12 - 18 1/2 1 packet
Kohlrabi
April 15 - June 1 or
Aug. 1 - 15
18 - 24 6 1/2 1 packet
Lettuce, leaf
April 15 - June 1 or
Aug. 1 - 15
12 - 18 4 - 6 1/4 1 packet
Lettuce, head March 1 - 15 April 15 - May 1 18 - 24 12 1/4 (indoors) 1 packet or
18 plants
Muskmelon May 15 - June 1 60 - 72 18 1 1 packet
Okra March 15 - April 1 June 1 24 - 36 12 - 15 1/2 (indoors) 1 packet
Onion seeds April 15 12 - 24 2 1/2 1 packet
Onion, transplants Feb. 1 - 15 April 15 12 - 24 2 - 3 1/2 (indoors) 1 packet
Onion, sets April 15 12 - 24 2 - 3 1 - 2 1/2 lb
Parsley
April 15 - May 1 12 - 24 4 - 6 1/4 1 packet
Parsnips
May 1 - 15 18 - 24 3 - 4 1/2 1 packet
Peas April 10 - May 15 18 - 24 2 1 1/2 1 packet
Pepper March 15 - April 1 June 1 24 - 36 18 - 24 1/2 (indoors) 1 packet or
12 plants
Potatoes, Irish April 15 - June 1 24 - 30 12 - 18 4 (each piece) 3 lb seed potatoes
Potatoes, sweet April 15 (roots) June 1 36 - 48 18 - 24 9 - 12 plants
Pumpkin
May 10 - June 1 72 - 96 24 - 36 between single plants;
60 - 72 between hills of three
1 - 2 1 packet
Radish April 10 - June 1 or
Aug. 1 - 15
6 - 12 1 - 2 1/2 1 packet
Rhubarb April 15 - May 1 36 - 48 36 - 48 5 or 6 plants
Rutabaga May 15 - June 15 18 - 24 8 - 12 1/2 1 packet
Spinach
April 15 or Aug. 1 - 15 12 - 18 3 - 4 1/2 1 packet
Squash, summer May 10 - June 1 24 - 36 24 - 36 1 1 packet
Squash, winter
May 10 - June 1 72 - 96 24 - 36 between single plants;
60 - 72 between hills of three
1 1 packet
Sweet corn May 10 - July 1 30 12 1 - 2 1 packet
Tomato April 1 - 15 May 15 - June 1 24 - 36 36 - 48 1/4 (indoors) 1 packet or
6 - 8 plants
Turnip
April 15 or Aug. 1 15 - 18 3 - 4 1/2 1 packet
Watermelon May 15 - June 1 60 - 72 24 - 36 between single plants;
60 - 72 between hills of three
1/2 1 packet