Onion harvest does not arrive at the same time every year. One section of a field may be ready while another still has green tops standing upright, so the plants should tell you when to start. Knowing when onions should be harvested helps you avoid pulling them too soon or leaving them in the field longer than needed. Watch for a few clear changes, then plan the next steps around curing.
Watch the Tops for Harvest Signals
For mature bulb onions, the tops are one of the easiest places to look first. As the bulbs finish maturing, the foliage dries, and the tops break over near the neck. When the tops are fully dried and broken over, the crop is ready to move toward harvest.
Do not expect every plant to change on the same day. Walk more than one part of the field and compare what you see before deciding that the whole crop is ready. A patch with upright, actively green tops may need more time even when another row looks finished.
The goal is to judge the planting as a whole instead of reacting to the first few fallen tops. During a busy harvest, that extra walk through the rows can keep you from pulling part of the crop before it is ready.
Check the Bulbs Before You Pull
Once the tops signal maturity, check the bulbs before moving through the whole field. Mature bulb onions should feel firm and well developed, without obvious soft spots or damage. Look at representative plants from several areas instead of basing the decision on the easiest row to reach.
That quick check also tells you how evenly the field matured. If one section still looks active, harvesting in stages may be more practical than pulling the whole crop at once. This gives slower areas more time without holding back onions that are already mature.
Green onions follow a different harvest pattern because they are sold young and fresh rather than cured for dry storage. For bulb onions headed into storage, dry tops and mature bulbs are the signs that matter most.
Choose the Right Harvest Window
Once the crop is mature, the weather becomes the next concern. A dry window makes handling and curing easier because you are not bringing extra surface moisture into the curing area. If the weather changes, move harvested onions to a protected space with good ventilation instead of leaving them exposed.
Although onions look sturdy, rough handling can still bruise bulbs or damage their outer layers. Avoid throwing onions into piles or dropping them into containers from unnecessary height. Careful handling now makes the later sorting process easier.
A simple harvest routine can help your crew keep the crop moving without getting rough:
- Lift or pull mature bulbs carefully from the soil.
- Brush away large clumps of loose dirt instead of washing the crop.
- Separate visibly damaged or soft onions as you work.
- Move mature bulbs promptly to the curing area.
Sorting as you go means fewer questionable bulbs end up in a larger batch. It also saves you from having to find and remove the same problems after curing.
Cure the Crop Before Packing
Harvested onions still have one important stop before packing: curing. This step gives the necks time to dry and allows the outer skins to become papery. Once cured, the bulbs are better prepared for the storage and handling that follow.
Spread the onions in a single layer where air can move around them. Use a dry, protected space with steady ventilation when field conditions are not suitable. Avoid deep piles because onions in the middle won't get the same airflow as those around the edges.
Curing commonly takes about two to three weeks, but the crop should make the final call. Check the onions instead of relying on the calendar alone. The necks should be completely shriveled, and the outer skin should feel dry and papery before the onions move into storage packaging.
Market schedules can make it tempting to bag onions as soon as the fieldwork is finished. Packing them while they still hold excess moisture works against the dry conditions you want after harvest. Giving the crop enough curing time makes the next steps easier.
Sort the Crop After Curing
Curing gives you a second chance to check the quality before onions move into storage or outgoing orders. Inspect the bulbs again and set aside anything that has softened or developed visible decay. A bulb that looked good at harvest may reveal a problem once the outer layers have dried.
This is also a good time to organize onions by how they will be sold. Smaller farm stands may want manageable quantities that are easy to restock throughout the day. Larger growers may need consistent pack sizes that fit an established storage or shipping routine.
Keep the sorting area close to the curing and packing spaces when possible. Repeatedly carrying onions back and forth adds handling without improving the crop. A simple flow from curing to sorting and then packing keeps the work moving during a busy season.
Pack the Crop With Airflow in Mind
Once onions are fully cured and sorted, packaging should support the dry, ventilated conditions you worked to create. Breathable mesh is commonly used for dry bulb onions because it lets air keep moving around the crop during storage and transport. That open construction also keeps the onions contained without sealing them into a closed package.
Choose bag sizes around how your crew and customers handle the crop. A smaller farm may need lighter bags that are easy to move around a stand, while a higher-volume operation may pack larger quantities for storage or distribution. Whatever size you use, avoid stuffing bags so tightly that you restrict the airflow you selected mesh to provide.
Mesh also keeps onions visible without repeatedly opening the package. That makes quick quality checks easier and helps market vendors see when a display needs restocking.
Knowing when onions should be harvested is the first decision, not the last. Good timing gets mature bulbs out of the field, while careful curing and breathable packaging help carry them into storage and sale.
Prepare Your Onion Harvest for Market
Good onion harvests start with reading the crop, not chasing a date. Wait until the tops dry and break over, then confirm that the bulbs are firm and mature. After harvest, give the crop enough curing time for the necks and skins to dry before sorting it for storage or sale.
If onion harvest is approaching, it helps to have packaging ready before the cured crop needs to move. Globe Bag Company offers onion bags for sale in a range of sizes for different farm and market needs. Choose the size that fits how your crew packs, stores, and sells onions so you are not scrambling for supplies after curing is complete.