At present, there are two ways to cultivate bean seedlings in the market. One is soilless culture, which can be supplied all year round. Generally, peas (green peas or hemp peas are better) are cultivated in trays, and they can be harvested in about 10 days. One is soil cultivation. Generally, the seeds of asparagus pea seedlings are sown in autumn and the tender heads are harvested in winter. According to what you said, it probably belongs to the first kind. Soilless culture is generally finer than soil culture.