If you love the juicy, sweet taste of strawberries but don't have space to grow them in a garden, a strawberry jar may be just the solution. While you may not get the same yield as with garden planting, you can choose a variety of strawberry that continually produces fruit to maintain a constant crop. Strawberry jars are urn-shaped pots with with a wide mouth and slanted holes randomly placed around the surface. Strawberry jars are available in a wide range of sizes and colors, making them perfect for porch and patio gardening.
Clean and rinse the strawberry jar thoroughly to remove any manufacturing residue or old soil particles from previous use.
Mix potting soil and slow-release fertilizer (per manufacturer's directions) in a bucket and then add water to moisten the soil thoroughly without making it soggy. Choose a premium potting mix that contains water crystals to help maintain even moisture throughout the jar.
Place a coffee filter or a layer of small rocks over the bottom of the jar to prevent soil from spilling out through the drainage hole. Cover with enough of the potting soil to reach the level of the bottom surface holes.
Insert one strawberry plant per hole, going through the wide mouth of the jar first. Gently feed the leaves of the plant through the side hole and then push the root ball down into the soil.
Place a paper towel tube into the center of the pot, pushing it down into the bottom layer of soil for support. Fill the tube with rocks or floral glass stones. When watering, pour water directly into the tube. This will allow water to reach all of the strawberry plants evenly and help to prevent bottom plants from rotting due to too much moisture.
Continue adding soil up to the next level of holes, repeating the process of gently feeding each plant through its own hole. When you reach the top of the pot, plant three or four strawberry plants around the circumference of the mouth, leaving adequate space in between each plant for growth.
Place strawberry jars in an area that receives full sunlight. Maintain adequate moisture levels by watering once a week. Apply a high-phosphorous liquid fertilizer every two weeks to encourage fruit production.