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08 Dec 25 Tom (Australia - temperate climate)

What is the best companion for sweet corn

19 Jan 26 Celeste Archer (Canada - Zone 5a Temperate Warm Summer climate)

In addition to my reply below - I should mention - you can plant more than one corn plant on a mound ( and probably should). IT DEPENDS on how big your mound is...three might be good...5 might be better. If you planted them in a circle spacing is less of a concern (than when in rows), because the roots can spread away from the circle, and being on a mound sunlight tends to be good.

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18 Jan 26 Celeste Archer (Canada - Zone 8a Mild Temperate climate)

Since I'm from North America, my answer is a "canned/typical" answer. MANY people use the 3 sisters planting here -- -- The "Three Sisters" planting method is a traditional Indigenous companion planting technique using corn, beans, and squash together in clusters. Today’s gardeners will want to keep in mind that Indigenous cultivators who originated Three Sisters farming would have been growing dent, flint, or flour corn rather than sweet corn. The corn stalks serve as a living trellis for their sister beans. Although you can grow sweet corn as a substitute for the flint type, avoid popcorn. The stalks of these plants are short enough that they might be overwhelmed by the other plants. Don’t attempt to substitute bush beans for the pole type, as the former won’t climb. You can choose whichever type of squash or pumpkin suits your fancy for this sister planting. Keep in mind that summer squashes tend to grow more bushy than vine-like, so they don’t make the best groundcover. In addition to the Three Sisters, you may also want to sow other tall plants, like sunflower, Jerusalem artichoke, or amaranth, in the spaces between the hills. There, squash vines will provide groundcover for them. In addition to attracting pollinators, these extra plants can produce a crop, too. Sow them at the same time you sow the corn to give them a head start on the squash vines. This planting creates a symbiotic system where corn provides a stalk for beans to climb, beans add nitrogen to the soil, and squash covers the ground to retain moisture and suppress weeds, offering a balanced, sustainable food source. The sequence involves planting corn first, then beans a few weeks later, and squash after the beans have started to grow, ensuring each plant supports the others as they mature. Plant the corn and beans on a mound -- and the squash around the mound -- plant the additional plants (if desired) between the mounds (sunflower, Jerusalem artichoke, or amaranth, or other tall plant). So in your case : 1. build your mounds & plant your SWEET corn in the middle of the mound (also plant the additional plants between the mound if desired - don't forget the boron for the corn), give it a couple of weeks, then 2. plant your POLE beans (or Green bean, string bean, snap bean), once the beans are going, 3. plant your WINTER squash around the mound. IF YOU ARE IN A VERY ARID AREA -- mounds dry out quickly, so you'll need to water MORE OR skip mounding and plant this formation flat.

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02 Jan 26 (Australia - sub-tropical climate)

Corn should be planted about 150mm apart in rows about 500-600mm apart. Corn grows to 1.2-1.8m high so will shade most other plants most of the day. Also it is best to hill the soil up around the plants when about 400-500mm high. This would disturb other plants growing in the inter-row.

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