When To Plant Onions In Idaho?

If you’re trying to figure out when to plant onions in Idaho, know that the best time to do so is in spring simply because onions are a cool-weather crop in its initial stages of growth. If you live in mild-winter areas, you can choose to grow onions during fall or winter. In other words, onions grow their tops in a cooler climate, while they form their bulbs when the weather’s warmer.

When To Plant Onions In Idaho

When To Plant Onions In Idaho And Idaho’s Plant Hardiness Zone

The best time to plant onions in Idaho depends on your area’s hardiness zone. It’s important to know the frost dates so you can plant your seeds at the right time.

To ensure an abundant harvest, make it a point to plant your onions at least four to six weeks before the last frost. You can plant it earlier if you initially grow it indoors.

For the state of Idaho, they fall under the USDA plant hardiness zones 3 to 7. Take a closer look at the planting schedule for onions (start seeds indoors to plant seed/transplant to harvest):

  • Zone 3: n/a
  • Zone 4: Mid-April to Mid-September
  • Zone 5: April to September
  • Zone 6: Mid-March to August
  • Zone 7: March to August

For more accurate information, make sure to stay updated on your local weather.


What Are Onion Sets?

Onion sets are small and dry onion bulbs grown from seed in the previous year. They harvest the onion as an immature bulb rather than allowing it to mature. These bulbs are then stored until the next planting season.


When Should Onion Sets Be Planted?

You can plant your onion sets in early spring. They’re very easy to grow and you can harvest them quicker since they have already started the initial growth phase.

However, it’s important to note that onion sets are limited to a few varieties. In most cases, you can only plant yellow, purple, and white onions.


How Many Onions Do You Get From One Plant?

You will only reap one onion from one bulb. Even though you can only get one onion, there are other ways you can benefit from one onion plant:


Green Onions

Most people are familiar with green onions (also known as scallions); the green stems that grow above the bulb. If each stem is one scallion, you can expect to harvest around 3 to 11 scallions per onion bulb.


Onion Flower

Once your onion plant flowers, you can collect the seeds from the flower to plantgardenbetty.com/bloomin-onion more onions. Make sure to harvest the seeds before the flower blooms.


How To Grow Bigger Onions

Here are some of the tips you should remember if you want to grow bigger onions:


Plant them early

Your onions will need all the time they can get to grow big.


Water your onions regularly

Just like most plants, it’s important to keep your onions well-watered. The more water you give them, the plumper your onions get. So, make sure your soil stays moist.



Adding mulch around your onions will prevent weeds from growing. Otherwise, the weeds will absorb all the nutrients and water, and it will spread harmful diseases to your plants.


Plant them in good soil

Onions thrive best in loose, sandy loan soil. Onion bulbs that can freely expand will grow the largest. On the other hand, soil compaction restricts the growth of the onion.


Leave your onion until the tops resemble paper

Once you notice that the tops die back, leave them in the ground for up to two weeks until they fall over. Your onions will continue to grow and absorb water, so make sure to leave them there for a few weeks.


How Many Days Does It Take For Onions To Grow?

Onions take time to mature. For scallions, they will be ready to harvest within three to four weeks after planting. For dry bulb onions, it usually takes 100 to 175 days before they mature.


Growing Onions In Mini Greenhouses

When planting crops in Idaho, you need all the help you can get to reap bountiful vegetables and garden plants. As mentioned, growing big and healthy onions take time. Mini greenhouses let you extend your growing season, allowing you to grow big onions.

One of the advantages of mini-greenhouses is that it doesn’t require significant investment. It’s practical and cost-effective, especially for those who don’t want to commit to having a full greenhouse.

Whether you’re planning to grow onion or off-season vegetables, a mini-greenhouse allows you to enjoy the benefits of growing plants that normally can’t thrive in Idaho.

Here are other reasons why you should consider getting a mini greenhouse:

Control the temperature

When exposed to the elements, your plants may be subjected to extreme heat and cold. This negatively affects your onions and other plants, hampering their growth.

Placing them in an enclosed space with a controlled climate ensures that they are safe, regardless of the temperature outside. You can even add heating and ventilation systems, timers, lights, and shades.


Prevent harmful pests and diseases

Onion flies, lesser bulb flies, and botrytis are some of the pests and diseases that affect onions. These pathogens cause stress and stunt growth. Placing them in a greenhouse allows your onions to focus on healthy growth, rather than repair and defence.


Produce more quality onions

By keeping your onions happy and healthy, you can improve their production and growth. Limiting exposure to extreme weather conditions, pests, and diseases, you create a healthy environment for your onions to grow. This improves the quality and quantity of the onions you harvest.


Final Thoughts

Planting onions in Idaho can be a pleasurable and rewarding experience if you have the right tools and resources. Mini greenhouses are suitable for any type of property, whether you live in a small apartment or a house with a backyard.

Now that you know when to plant onions in Idaho, the next step is to consider investing in a greenhouse. If you’re looking for high-quality and affordable mini-greenhouses, Krostrade offers different options for every gardener. Check out our products today!

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How To Prevent Root Rot In Hydroponics: 3 Useful Tips

If you’re a newbie gardener who’s looking to find ways to hone your skills, you’d want to learn how to prevent root rot in hydroponics even before this problem affects your plants.

Hydroponics can be advantageous to crops in more ways than one. However, it also comes with risks of diseases, such as root rot, which can be destructive or even lethal to your plants.

Unfortunately, there are no effective methods to recover the wilted parts that were affected by the root rot once it hits your plants. The only thing you can do if you do not want this catastrophe to befall your crops is to prevent it before it happens. Read on to learn more about this subject.


What is Root Rot?

Root rot is a disease that attacks the plant roots and causes them to suffer decay. This usually happens when a lack of oxygen supply occurs in the substrate.

To give you an idea, think about plant roots that are submerged in water that only has a little oxygen in it. Over time, the plant suffocates and dies.

Aside from rot and decay, this disease also leads to the proliferation of fungi that are naturally present in the soil. These include Rhizoctonia, Alternaria, Pythium, Botrytis, Fusarium, or Phytophthora. As soon as fungi colonies start to grow, they tend to target the weakened roots and infect your precious plant babies.

Once the plant becomes infected, they won’t be able to take in what they need to grow – water, oxygen, and other nutrients. When this happens, it won’t be long before the plant dies.


What is Hydroponics?

In case you’re not aware, the term hydroponic is derived from a Latin word that means “working water”. To put it simply, hydroponics is an art that involves growing various types of plants without soil. If you’re like most people, the first thing that comes to mind when somebody talks about hydroponics would be a picture of plants with roots suspended into the water without using any type of growing medium.


Avoiding Root Rot in Hydroponic Systems

Detecting and identifying root rot can be tricky. When your plants get infected, their leaves and roots gradually wither until the whole crop itself dies from the lack of nutrients, which is a common symptom of many diseases.


What causes root rot in hydroponics?

One of the requirements in hydroponics systems is oxygen. Without it, your plants are basically on the road to death. On the other hand, lack of such is one of the major triggers for root rot, and it must be avoided at all costs.

Just like when planting in soil, you loosen up the ground so that your plants’ roots can have their required intake of oxygen. That is the case for crops grown in aqueous solutions as well. If they cannot breathe, they would not be able to grow.

Another agent for root rot is the temperature. The last thing you would want in your system are parasites that leech nutrients intended for your plants and infect the water during the process. In common terms, these fungi are called molds.

One of the best breeding grounds for these is warm and moist areas. For this reason, if the water temperature inside your reservoir is high, then you are susceptible to it. Something as minor as letting the solutions exposed to sunlight can already be a risk factor.


3 Useful Tips on How to prevent root rot in hydroponics

There is good news! Root rot in hydroponics can be prevented! Just follow these tips:

Tip#1: Use the right air pump

If you do not want root rot to affect your plants, you merely have to avoid its causes. If you need oxygen, keep the water bubbling by providing an air pump of appropriate size, and also give importance to proper ventilation in the room.


Tip #2: Maintain the temperature

The temperature should be maintained within the 70 to 80 degrees F range. Get rid of any materials that can make your system vulnerable to infections, and make sure not to disturb your crops while they are trying to grow.


Tip #3: Get rid of the rotten parts

However, if you failed in preventing the disease, then the rotten parts should be removed immediately. Cut them off as there is no chance of reviving them, and focus on the potential new growth instead. Fix your hydroponics system and eliminate the risks.


Why Give Greenhouse Gardening a Try?

Greenhouse gardening offers numerous benefits to greens aficionados who dare to take their gardening experience to the next level. Aside from acting as a shield against the effects of inclement weather, a mini, hobby, or semi-pro greenhouse can also serve as a protective layer that keeps harmful bugs and critters at bay.

What’s more, its enclosed structure allows you to control your plants’ growing conditions including the temperature, light, moisture, and ventilation of the greenhouse’s internal environment. With a controlled environment, you’ll be able to extend growing seasons and grow plants that aren’t native to your area.



No matter how well-informed you are about how to prevent root rot in hydroponics, you cannot completely eradicate the risks. Therefore, to avoid the worst-case scenario, you should be prepared to sacrifice the infected for the sake of others. While you’re at it, consider trying your hand at greenhouse gardening as well.


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