The time of year when oyster farming begins usually depends on the geographic location, water temperature and farming method. However, in general, most countries start stocking oyster seed in spring to early summer (March-June) for the following reasons:
The time of year when oyster farming begins usually depends on the geographic location, water temperature and farming method. However, in general, most countries start stocking oyster seed in spring to early summer (March-June) for the following reasons:
Overview of start times by country
| area | Seedling planting time | illustrate |
| France | March–May | The water temperature rises in spring, which is conducive to the rapid growth of oysters |
| Japan | April–June | Mainly raft farming, moderate water temperature, rich algae |
| Australia | Different regions have slightly different seasons, but temperate regions mostly have seasons from September to November (spring in the Southern Hemisphere). | Adopt drum and bag culture system to adapt to local conditions |
| United States (East Coast) | March–June | Especially in the Chesapeake Bay, Louisiana and other places |
| Canada | May–July | The breeding season is short, but the water quality is good and the meat quality is good |
Why is spring and summer the best time to start?
The water temperature rises (above 15°C)
It is the active temperature for oyster growth, which is conducive to the rapid adaptation of new seedlings to the environment.
Rich in plankton
In spring, there is plenty of sunshine, the nutrients in the water increase, and the phytoplankton blooms, which is a natural "bait bank" for oysters.
Avoid the cold winter
When the water temperature is below 10°C in winter, the growth of oysters basically stagnates, and the survival rate of seedlings in the cold is low.
Note: Some aquaculture adopts a continuous seedling system throughout the year
For example, farmers who use artificial seedlings (hatchery) can raise seedlings all year round, but the best time to release them is still spring and summer, otherwise it will extend the growth period.
Foreign oyster farming usually starts to release seedlings from spring to early summer (March-June) every year, because the water temperature is suitable and the bait is abundant at this time, which is the golden period for the rapid growth of oysters.