Radish is one super friendly vegetable to grow in small spaces. Hence it is a favorite among people doing container gardening. You can grow them in as small container as a recycled plastic soft drink bottle. Yes you heard me right. You can grow full fledged radishes even in small containers as plastic bottles. All you need to do is to do it in the right way. This post is a complete guide on How to Grow Radish in Containers from seeds to harvest.
Quick Reference Table to Grow Radish in Containers
There are many varieties of radishes to choose from. From long slender ones to round ones, from white ones to red ones, the choices are many. Every variety varies in term of optimal growing condition. This table is a more generic table that covers almost all general varieties.
|Growing Temperature||10 – 28 °C|
|Germination Temperature||15-30 °C Ideal|
|Germination Time||3-7 days|
|Soil pH||6.0 to 7.0|
|Sunlight Need||5-8 hours per day|
|Preferred Planting Method||Direct Sowing|
|Container size||3-4 can be planted in a 10 liter containers. Keep 6-8 inch distance between two plants.|
|Time to Harvest||30-40 days from germination|
|Harvest Period||10-12 days|
|Pollination||Radish is a root vegetable which is harvested before it starts flowering.|
|Typical Pests||Aphids, Cut worm, Cabbage looper|
|Best season to plant in India||Beginning of winter and through winters|
Choosing Container for Radishes
As I told in the beginning of the post radish can be planted any type of container with some minimum depth, so that the root has enough space to grow. You can choose from grow bags, recycled wooden boxes, recycled thermocol boxes, old plastic buckets, recycled paint buckets, recycled plastic bottles (2 liter of bigger bottle works well. Avoid anything less than 1.5 liter bottle), recycled juice or milk cartons or your good old un-glazed earthen pots. To grow radish in containers the choices of containers is endless. Just use a little imagination. And you can recycle many things at your home and grow radishes in them. Just make sure that depending on the variety of the radish, the root will have enough space to grow downwards.
Seed Sowing and Germination
For sowing seeds prepare your container in the morning and leave it in the sun so that the potting mix warms up by evening. For sowing make marks with your finger at the place where you would be sowing your seeds. Now scoop out potting mix from around the mark to make a small well. The depth of the well can be approximately 1 inch. At the center of each well make a hole of approximately 0.5 inch depth. Drop 3-4 seeds in each hole and cover the hole loosely with some potting mix. Water using a watering can. Keep the potting mix moist and make sure it gets sunlight. You’ll have your first few seeds germinate in about 3-5 days. When the saplings are about 3-4 inches tall thin the saplings to just one.
Now you could always sow the seed without making the well. But there is a reason why we recommend making the well. Young radish plant is very frail and tends to bend even in light windy condition. When the plant bends, its root does not develop too well. When the plant is young and has grown to approximately 2 inches of height, the well is covered with potting mix and lightly firmed with hands. This makes sure that the radish plant stands straight and develops a proper root.
Growing Radish in Containers
Radish is a root vegetable and hence the condition for the root to grow should be kept at optimum. If your pot dries up often the root will not be able to grow well. Hence keep the potting mix moist. But make sure that its not too wet. That will cause the root to rot. If your potting mix is a well drained one and you have made proper drainage holes in the container then you should not have issue of rotting.
Liquid fertilizers work well for root vegetables. Hence use organic liquid fertilizers like Amrut Jal, Jiwamrit, Panchagavya, compost tea once a week to fertilize your radish plants. Keep checking under the leaves once in a while for aphids. If you find them spray them away with jet of water. Alternatively you can use neem spray once in a week to get rid of them. If you find any leaf eating caterpillars of insects just remove them manually. Check for them early in the morning else you’ll never be able to spot them.
When the plant is frail and young protect is from strong winds. If the plant still bends down straighten it up by putting some soil around its trunk and firming it up making a small mound. Bent radish plant means not well formed radishes. So try to keep the plant straight before radish starts developing. To grow radish in containers this is all you have to do and in no time they will be ready for harvesting.
When radish roots starts developing it starts to peek out from the soil. So just keep checking how well your radish has grown before harvesting it. When radish plant starts flowering the radish does not taste very well. Hence in case you see any signs of flower harvest your radish immediately. Ideally you should be harvesting radish well before it flowers. To harvest just pull out the radish from your pot. You could wet the soil to make the soil loose before harvesting. And remember to wash your radish clean before consuming them. When you have harvested your radish do not throw away its leaves. The leaves can also be cooked as any green leafy vegetable and let me tell you it tastes yummy.
As radish has a very short time to harvest, you can keep sowing radish seeds once every 10-12 days in your garden. This will make sure you have a continuous supply of radish during its growing season. One last tip to grow radish in containers would be to plant your radish as a companion plant. As radish does not take up too much space it can be planted along with egg plants or tomatoes as a companion plant and you can enjoy fresh radish from your garden without even having to get a separate container for it.