2008年4月20日 星期日

03. Germination

Germination

So, you have your beans in your hand. Now you are wondering what you are gonna do to get these to start growing. If you have purchased seeds from a reputable seed bank then you can be sure that they are all fit to attempt to germinate since they have been through a screening process already. However, if you have obtained your seeds from a bag then you need to do some simple checks to see if the seeds are viable or not. One way to test yourself is to lightly squeeze the seed between your index finger and thumb. If it gets crushed, then it's no good. Usually white, dried up seeds are immature and will crush. Dark green, green or brown seeds are more apt to germinate well. You can't tell the sex of a plant by looking at the seeds. The are some theories here but there are no physical signs that one can use to distinguish male from female seeds.
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Some people like to germinate the seed using methods such as the paper towel method before they grow the plant. This is to ensure that the seeds get off to a good start. But it is not really necessary to do this unless you have a large amount (50 ore more) of seeds for your area. If you only have a few seeds then you can plant them right in the soil.

Paper Towel Method

To germinate in a paper towel simply place the seed between to dampened pieces of the paper towel. Next, place the seed/towel combination into a Tupperware container or plate. Set the container on top of a computer monitor, refrigerator or propagation pad and wait until the seed cracks and you see a tiny white root tip start to emerge from the seed.

Planting The Seed

After you have germinated the seed you will see a little white root sticking out of the split shell. Dig a small hole in the soil. The end of a pencil works great for making a hole. When planting the seed or sprout be sure to only go down 1/4" to 1/2" and drop the seed in. Make sure that the root or pointy side of the seed is pointing down when inserting into the soil. Fill over the whole with soil, then keep the soil moist but not damp/wet with some water. You should provide at least 4" of vertical space for the tap root to grow down. Place one seed each in a 20 ounce cup, or a one gallon pot, then place your pot under your lights. Start with a 24/7 light cycle, meaning twenty-four hours on, seven days a week. You should see sprouts within 2-14 days depending on your individual conditions and the method you used. For quickest results try and keep the temperature in the mid to high 80's (F). You will see slower germination rates but lower temperatures are acceptable as well (70s), this will simply increase the amount of time it takes to germinate the seed.

What To Look For

The sprout will emerge first with the two seed leaves. These leaves are small, smooth and round followed by a set of single bladed, serrated leaves known as the first leaves. The height of your light from the sprout will depend on what kind you are using. If using florescent lights, they usually run cool enough to put them within 1-2 inches of your sprouts. If your going with a HPS or MH type of light, they get hot, so you won't want them too close. A good way to test a light is to put your hand between the plant—or in this case soil—and test how hot it is with your hand. If it's uncomfortable for your hand, it's too hot. Raise the light up until you reach a good temperature. These type of lights will also dry your soil out fast, so keep your eye on it. Once your light is set and the leaves start coming in you now are on you way to growth stage.

Once you see the plant break though the top of the soil—it should take from 1 day to 1 week—you will see two small round leaves. Your plant will grow up a few inches with the two leaves getting a bit bigger and new leaves starting between the two round ones. Your stem will probably look white, green or even purple at this stage. The color depends on what strain of plant you have.

What To Avoid

It's advised that you refrain from giving your plant fertilizer during the first stages of growth. These stages are quite delicate, it doesn't take much to make a fatal mistake. Remember though, that throughout the whole life span of your plant, like most other things in life, the more things you have going on at one time, the more likely for a problem to arise. Your best bet is to keep things simple.

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