You can grow herbs indoors or outdoors in any type of container, including cans, as long as there is proper drainage, water, light and temperatures. Herbs that can be grown in scan include tarragon, rosemary, parsley, marjoram, thyme and basil. If you have the room for a herb garden indoors or out, you will have a handy supply of herbs all year long using containers you would have thrown away.
Poke three holes in the bottom of each can with a screwdriver. Fill the cans with soil. The soil should come to 1/2 inch from the top of the can. Use an all-purpose soil or one part perlite and one part peat moss. Plant the seeds in the soil about 1/2 inch down in the soil.
Place the cans of herbs in a window or outside area with plenty of sun. The west or south sides of the house are the best if the sun is unobstructed. You will need to turn the cans as the plants start to grow toward the sunlight.
Water the herbs when the soil is dry. Poke your finger down about half an inch in the soil to see if it is dry, and water if needed. If the soil is wet or moist, do not water.
Keep the temperatures above 50 degrees F. Herbs can grow in any temperature, but with extremely hot temperatures, more watering may be needed. The ideal temperature is about 66 to 70 degrees F.
Add fertilizer at half the recommended dosage on the package once a month during spring, summer and fall. Avoid fertilizing during the winter. A 10-10-10 fertilizer will work because it has equal parts of nitrogen, phosphate and potassium. However, herbs can go without fertilizer if you prefer.
Prune the herb plants during the spring, summer and fall if you are not using enough of the herb. During the winter, the herbs do not need pruning. Prune the top growth back so that the herbs stay compact and easier to manage.