Don’t assume that all seeds must be soaked before sowing; some are better off with a little presoaking. But knowing which ones are easy to get into and which ones aren’t, is key.
Some seeds has a hard coat that prevents water from getting in. Presoaking helps water enter the seed so embryo inside can begin to grow. This process is known as imbibition. It softens the seed and starts enzyme action. Beet and okra seeds will take three weeks to come up if you don’t pre-soak, for instance; soaking them shortens the wait.
When to Soak Seeds
There are exceptions: Not every seed is meant to be soaked. Refer to a seed-soaking chart to determine which ones should get the treatment (some have coats so thick and waxy that they benefit from a pre-germination soak). Examples include beets, parsley, and okra. Those are seeds that gets more benefit from a thick coat. The shell helps protect them from bad growing conditions; and their dormancy is good! To encourage even and faster germination, soak those for 18-24 hours.)
Are there small seeds, such as onion, lettuce, and carrot? Nope, don’t do it. These delicate seeds are powdery and so tiny that when you soak them they form a little clump of seed, a wad… That won’t come apart well enough for planting. Don’t soak them; these tiny seeds is practically dust and will clump together into an unplantable ball.
Here’s what you do: Soak the seeds following a four step process. Examine them first, and discard any that look damaged. Rinse the rest for thirty seconds. Why? Do this to get rid of dust and other debris which otherwise clouds the water and invites mold.
Submerge the seeds using about three parts water to one part seed. That’s enough liquid to keep the seeds wet. Time yourself. Leave them in the water longer than necessary, and the water will go sour killing the embryos. Let them sit in room-temperature water, preferably about seventy degrees Fahrenheit. Warmth can promotes bacteria; cold will slow things down.
Things also change on the inside when a seed soaks up some moisture. As the seed’s membrane soaks up water, it increases enzyme activity by around thirty-five percent, starting the conversion from starch to sugar before hitting the ground. But even though there is more moisture present, there isn’t much air in still water. That means you need to empty the seeds quickly. The goal is to plant the seeds within about fifteen minutes of swelling. Otherwise, they will begin to dry up on the tray and shock the developing root.
People often over-soak their seeds. The thinking is “the more water, the better.” No: the data say otherwise. Soaking for double the recommended duration will result in a fifty-five percent loss rate; soaking for three times as long will leave your seeds looking like mush. All you are trying to do is soften the coating. Not liquefy the seed. If the water goes cloudy, discard it at once. That means there’s a heavy presence of germs in the batch of seed.
That’s why soaking seed works with its individual biology. Not all crops soaks up this trick. First learn your crops: Which ones feature a waxy coat, a corky one, or otherwise a really hard shell? With these, soaking will save you from heartbreak and time. You should of been careful with water (moderate temp, clear water). The clock is ticking. This prep means a stronger stand of plants come season-end.
Actualy, some seeds can absorbs moisture different than others. It could of helped to check the waxy coats more naturaly. When you are preparring for planting, dont forget that the moddern way involves being carefull.