Abstract: 【Objective】 To explore the feasibility of lavender and mint stalks with vegetable seedling substrates as the testing materials. 【Methods】 The crushing and fermentation experiments were carried out on two kinds of spice plant waste stalks and the two plant stalks after fermentation were compounded separately with tomato as a test crop to carry out a seedling experiment. 【Results】 The fermentation of the two kinds of stalk at a high temperature above 45℃ lasted for more than 36 days, which showed that the two kinds of stalk were rich in easily degradable organic matter. After fermentation, the content of organic matter and nutrients was high, reaching 709.8 and 688.4 g/kg, and the total content of total nitrogen, total phosphorus, and total potassium reached 3.60% and 5.33%. The contents of available phosphorus increased by 15.57% and 19.72%, respectively, the contents of available potassium increased by 55.10% and 123.50% respectively. The physical and chemical properties of the two stalk substrates after being mixed with perlite and vermiculite were within the range of suitable soilless culture substrates. Compared to the peat substrate after the compound, there was no significant difference in the emergence rate, growth indicators and seedling quality of the two kinds of stalk substrates after the compounding. Of the two stalk substrates, the mint stalk substrate performed better in tomato seedling cultivation. 【Conclusion】 The two kinds of spice plant stalks can be used in production as organic raw materials for vegetable seedling substrates.