How Do I Get My Onions To Grow Bigger – A Guide To Yielding Large Crop

“How do I Get my Onions to Grow Bigger?” is a question that we have been often asked. For this reason, we have decided to answer the question and give you additional tips in this informative blog post. Onions are a commonly used vegetable throughout the world. This is because they can be eaten raw or cooked, like most other plants.

These bulbs have the ability to make any dish exciting, flavorful, and colorful. In many cultures, raw sliced onions are served as a side dish. The reason is that it is high in water content and has great health benefits.

With the ever-increasing cost of living, more people have now opted to grow their own fruit and vegetable. If planted in the right environment and given proper care and maintenance, these sought-after edible plants will thrive. However, for growing large healthy onions, there are a few know-hows that will assist you in achieving success. Have a look below to find out more!

What Makes Onions Grow Big?

Onions come in different shapes, sizes, and colors. However, How Do I Get My Onions To Grow Bigger? This will depend on a few factors that you should take heed of to aid them in reaching their full potential.

They can be grown from plants, in sets, or from seeds. Planting them in early spring will yield a harvest by fall, however, the right environment is required to help them thrive. Within 2 weeks of planting, you will start seeing green onion tops. Below are a few tips on planting onions and aiding them in growing big.


Tips – How Do I Get My Onions To Grow Bigger

  • Growing onions from plants or sets is recommended for a larger crop. If you plant seeds, chances are you could end up with smaller bulbs.
  • Sufficient but not direct sunlight is required for them to grow to maximum potential.
  • Be certain to choose a spot where the soil is soft and well-drained.
  • Planting them in containers helps get bigger onions, however, it is important that the container has plenty of drainage holes to prevent overwatering.
  • Allowing the onions to stay in the ground for longer will ensure that they multiply and grow bigger.
  • If you are planting them directly into the ground, dig a trench with loose soil and add fertilizer.
  • Plant them in rows about 10 to 12 cm apart. This will allow enough space in between for them to grow.
  • Do not plant them close to other plants and herbs as sharing nutrients will hamper their growth.
  • Keeping them weed free will also assist them to grow bigger.

Take Out Time to Also Read:

What’s The Best Fertilizer For Onions?

If you want to know, how to grow onions bigger, then having knowledge about plant foods will be beneficial. These include the best fertilizer and nutrients that will keep them thriving. Onions grow best in soil that is well drained with a pH of 6.0 to 7.0. The growing medium should also be high in organic matter for your plant to get sufficient nutrients.

Conducting a soil test will help determine if the area you choose to grow them is suitable for planting. Also, a combination of compost and manure is recommended to enhance their size. This is because both are rich in nitrogen, phosphorus, and potassium which are key elements that feed the plant’s root system.

You can also topdress the soil with a sprinkle of fertilizer at least three months before planting. Make sure you choose onions that are adapted to your area since they come in short and long-day varieties. As soon as the tops die down, you can use a composted manure-based fertilizer at one pound per 100 square feet. You’ll also want to add an all-purpose granular fertilizer at the rate of 1-2 pounds per 100 square feet.

Is Epsom Salt Good For Onions?

Yes, Epsom salt is good for onions and this is another key factor in enhancing their growth. This salt is a compound that contains magnesium and sulfate with numerous natural health benefits that are good for onions. It is an inexpensive, effective way to increase your crop size with little effort.

Epsoak Epsom Salt – 18 lb. Resealable Bulk Bag Agricultural Grade

How Do I Get My Onions To Grow Bigger

Check Price  

How Does It Work? – How Do I Get My Onions To Grow Bigger

The liquid magnesium sulfate acts as a tonic and helps develop strong roots quickly. It also contains sulfur, which prevents onion skin from splitting. Epsom salt is a good all-purpose fertilizer. According to avid gardeners, adding these salts to the soil can help onions grow bigger and faster. 

When planting onions, make sure to apply some Epsom salt on top of the soil before you add your bulbs.
Also, apply it twice or three times during the growing season when they seem to be at their peak. Before planting onion bulbs in the ground it’s a good idea to soak them overnight in water with Epsom salt (about 1 tablespoon per gallon of water).

They also help transport both nutrients and water to plant roots, ensuring they grow deeper and produce large bulbs.

Click Here to Get Info About:

How Many Times Should I Water My Onion In A Day?

Everybody wants a good yield, be it a seasoned or a start-up gardener. As mentioned above, onions grow in all shapes and sizes. Water is an important component of plant growth especially if you’re looking forward to a decent yield.

Onions are shallow-rooted and need only a little water to survive. Depending on time constraints, you can choose to water them every day with a light sprinkle or once a week to a depth of 2.5cm. Seedlings usually need more water than the actual onion plant. However, keep in mind that overwatering will make the plant rot. For this reason, it is best to test the soil before you water it.

If the leaves of your plant start to turn yellow, it is best that you stop watering. This is a sign that the plant is starting to rot. Ideally, you should stop feeding your onion plants at least 8 to14 days before harvest. During this time, you should see the green leaves start to fall over which is a clear sign of maturity.

How Many Times Should I Water My Onion In A Day

Conclusion – How Do I Get My Onions To Grow Bigger

Onions are a part of the everyday diet in most homes. Planting these at the right time, and using the correct soil and fertilizer will ensure you a good yield. This will also save you a lot of time and money.

These easy-to-grow, low-maintenance bulbs have many great health benefits as well, so consuming them daily will be advantageous. When planting, do not allow other flowers or herbs to infringe on nutrients that they require as this could hamper their growth. Also, you should always strive to keep their area weed free.

Using the tips provided in this blog post, combined with the proper soil and fertilizer will easily solve the question of “How do I get my onions to grow bigger?”. 

What variety of onions should I plant for larger bulbs?

Choose onion varieties known for producing larger bulbs. Some popular options include ‘Sweet Spanish,’ ‘Walla Walla,’ ‘Ailsa Craig,’ and ‘Giant of Zittau.’

When should I plant onions for larger bulbs?

Onions are typically planted in the early spring, as soon as the soil can be worked. In some regions, you can also plant them in the late summer or early fall for overwintering.

How should I prepare the soil for larger onions?

Onions prefer well-draining soil with a pH of around 6-7. Work in plenty of organic matter, such as compost, to improve soil fertility and structure.

How far apart should I space my onion plants?

Space onion sets or transplants about 4-6 inches apart in rows, with rows spaced 12-18 inches apart.

How much water do onions need for bigger bulbs?

Keep the soil consistently moist, especially during the bulb-forming stage. Onions generally need about 1 inch of water per week, either from rainfall or irrigation.

Should I fertilize my onions for larger bulbs?

Yes, onions benefit from regular fertilization. Apply a balanced fertilizer with a higher phosphorus (P) content to promote bulb development. Follow the package instructions for application rates.

Do onions need to be thinned for larger bulbs?

Yes, thinning is essential to give each onion enough space to grow. When the plants are a few inches tall, thin them to the desired spacing, typically 4-6 inches apart.

How do I prevent pests and diseases from affecting my onions?

Monitor your onions for signs of pests like onion maggots and diseases like onion white rot. Use appropriate organic or chemical controls if needed. Good crop rotation practices can also help prevent disease buildup in the soil.

When is the best time to harvest onions for maximum size?

Onions are ready for harvest when the tops have fallen over and dried up. Lift them carefully, cure them in a dry, well-ventilated place for a few weeks, and store them in a cool, dry location.

Can I grow larger onions in containers?

Yes, you can grow onions in containers, but ensure the container is at least 8-10 inches deep and has good drainage. Use a high-quality potting mix and follow the same care guidelines as for in-ground onions.

What are some common mistakes to avoid when growing onions for size?

Avoid overwatering, as this can lead to rot. Ensure proper spacing and thinning. Don’t plant onions in the same location year after year, as this can lead to disease problems.
Remember that growing larger onions often requires patience and attention to detail. Providing the right growing conditions and care throughout the season will help you achieve the biggest and healthiest onion bulbs.