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When Germinating Seeds Which Is Knot Side Up?

When growing plants, many instructions mention the "knot side" of seeds. The knot side is the part of the seed that the plant emerges from. The opposite of the knot side is where the roots emerge from the seed. Seeds are often planted knot side up, meaning the knot side points toward the edge of the soil so the plant will grow out toward the light. Germination, the moment a seed begins to sprout, releases the root from the seed. Germinate seeds before planting to make sure they are alive and will grow, as well as to make the knot side obvious to the eye.

  1. Knot Side

    • Before a seed has sprouted, it is sometimes difficult to tell which side is the knot side. Other times, it is obvious. The pointed end of a seed is the root side, where the root grows. The rounded end is the knot side. Pumpkin and sunflower seeds have obvious pointed and round ends. Other seeds, such as tomato seeds, are too small to see the knot side. Other seeds are round and have no obvious pointed end. When it is difficult to locate the knot side, germinate the seeds.

    Germination

    • There are several germination methods. The natural way is to plant the seeds in soil and wait. Other ways force the seeds to germinate faster and are done before planting the seeds in soil. Submerge seeds in water or place them between two pieces of wet paper towel. Once germinated, the root bursts out from the seed. Where the root sprouts is the root tip, and the opposite side is the knot side. Plant the seed in the soil so that the root points down into the dirt and the knot side points up. If both sides of the seed have sprouted, the root tip is usually white, while the knot side is green.

    Considerations

    • Not all seeds require planting knot side up. If the directions do not suggest a planting position, then it does not matter which side is up. Seeds planted knot side down should still grow. The roots grow around the seed and deeper into the soil. Depending on the seed, however, it is also possible that an upside-down seed will not grow at all. Test this hypothesis by planting half the seeds knot side up and the other half knot side down. Use the findings in future planting and germination.

    Warnings

    • Every plant is different and requires specific conditions for germination. Some need light, extreme moisture or cold to break from the seed; others require cutting the root tip to help the roots grow. Always follow the directions provided with seed packets. Do not assume that one method works for all types of seeds. Even following directions does not guarantee the seeds will germinate. Some seeds do not have enough energy to germinate if they are too old or were not stored properly.

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