Seed Stratification Techniques

How Stratification Is Done

• For stratification to occur, the seeds must be mixed in moist peat moss. However, the peat moss must be barely moist. The recommended ratio is- 1 or 1 1/4 parts of water to 1 part of air-dried peat moss. The mix must be sealed in plastic bags and kept at room temperature -- if warm moist treatment is required. In case of cold moist treatment, the bags must be stored in a refrigerator.

Cold Stratification

• This process requires the creation of a winter-like environment for the seeds to grow, which can be created simply by placing the bag of seeds and moist peat moss in the refrigerator. However, in cold stratification, check on the seeds from time to time in case germination takes place before the expected time. If the seeds begin to germinate while in the refrigerator, take them out and sow them normally.

Warm Stratification

• This process involves creating a summer-like environment to enable the seeds to grow. The seeds are planted in warm damp soil or mud and kept at a warm temperature, around 72-86 degree Fahrenheit. After germination, the seedlings can be planted.

Moisture Matters

• The key to the success of any stratification process is the moisture. Depending on the nature of the seeds, the level of moisture can be regulated. However, high moisture levels can lead to the invasion of fungus in the seeds, so seeds are generally left to germinate at low moisture levels only. Even at low levels of moisture, the seeds will develop normally, if planted with care.