It is appropriate to soak kelp for 30 minutes.

Kelp is a type of seaweed that is usually sold dried and needs to be soaked before cooking. The soaking time depends on the variety of kelp and how dry it is. In general, kelp needs to be soaked for about 30 minutes until it is soft and has absorbed enough water. If the kelp is soaked for too long, it may become too soft and affect the flavor.

It should be noted that when soaking kelp, you should use water rather than hot water. In addition, soaked kelp should be rinsed with water to remove sand and impurities from the surface. Kelp is a perennial large edible algae, sporophyte large, brown, flattened band. It is divided into blades, stalks and fixers, and the fixers are pseudorhizomorphic. The leaf blade is composed of epidermis, cortex and pith tissue, and there are sporangia in the lower part of the leaf blade.

Geographic distribution

Kelp belongs to the sub-boreal algae, which are endemic to the North Pacific Ocean, and some kelp is also found in the Atlantic Ocean. Most of the kelp is distributed in the northern hemisphere, while the southern hemisphere also has a small amount of distribution, generally grows in the subtidal zone on the seabed rocks. Kelp growth is mainly affected by temperature, light, nutrients and plant hormones.

The Pacific Northwest is the concentrated growth of kelp, most of the world's kelp species in this distribution, of which, the greatest economic value of kelp distribution in the western coast of Russia's Tartar Strait, the Gulf of Peter the Great, and Japan's Hokkaido and other coastal sea areas. After the introduction, real kelp is widely distributed in the eastern coastal waters and southern coastal waters of Korea, and also in the coastal waters of Liaodong Peninsula and Shandong Peninsula of China.