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Step 1
Radishes are one of those vegetables that are fairly easy to grow. In fact it is not necessary to even start them indoors. Regardless of whether you are growing them in a traditional backyard garden or in pots/containers or raised beds, growing radishes from the seed started outdoors is the best way to go. They can be grown in early spring, after the last frost, or in the autumn before frost sets in and they can germinate in as little as four days in optimal conditions. Do not plant the radish seeds any deeper than 1/2".
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Step 2
Radishes like to grow in a soil where the pH level is neutral or as near neutral as possible. You can test your soil's pH level by using a home soil testing kit available from any home or garden center for less than a few bucks. Try to get your soil's pH level above 6.0 and near 7.0 without going over. Most kits come with recommendations as to how to make the adjustments you are looking for.
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Step 3
Keep the soil moist. Radishes need a moist cool environment to grow in and if you let the soil dry out, it won't be long before your radishes stop growing. A moderate watering is all they will need. Remember you are trying to keep the soil moist not saturated.
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Step 4
Space your radish seeds out two inches to give them room to grow and plant them in an area that receives full sun, although some varieties will tolerate light shade.
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Step 5
When the radish tops are about two to four inches above the ground they are ready to be harvested. You do not want to leave radishes in the ground for too long as they could develop a sharp or bitter taste to them.
