Experiments were carried out to determine the effects of size and planting method of seed root on the sprout and early stage growth of Russian Comfrey(Symphytum peregrinum LEDEB.) during the period of 8 weeks from April to July 1972 at Kangwon National University, Chunchon. The seed roots used in the experiments classified into 3 classes of diameter of 0.5㎝, 1.5㎝ and 2.5㎝, and 4 classes of length of 2㎝, 5㎝, 8㎝ and 11㎝, and the seed roots were planted in 3 kinds o method, vertical planting, horizontal planting and reversed vertical planting. The results are summarized as follows: 1. Sprout percentage was higher and early stage growth was better with thicker and longer seed root. 2. In sprout percentage and early stage growth 0.5㎝-diameter plot was definitely inferior to 15㎝-diameter plot, and 2㎝-length plot was to 5㎝ and over-length plots(p$lt;0.05). But 1.5㎝-diameter plot was not significantly inferior to 2.5㎝-diameter plot, and 5㎝-length plot was not to 8㎝ and over-length plots in sprout percentage and early stage growth. 3. 1.5㎝-diameter. 5㎝-length was considered as adquate size of seed root. Showing 89.7% of sprout percentage, 28.0㎝ of leaf length, 7.2g of tops DM weight and 6.8g of roots DM weight at 8th week, 1.5㎝-diameter·5㎝-length plot did not fall so far behind those plots planted with seed roots which were bigger than that of 1.5㎝-diameter·5㎝-length plot in sprout percentage and early stage growth. 4. It seemed that sprout percentage and early stage growth were being improved by means of increasing in length in the seed root of small diameter or increasing in diameter in the seed root of short length. A thin and long seed root, however, seemed to show comparatively higher sprout percentage and better early stage growth rather than a thick and short one (p$lt;0.05). 5. Sprouting and early stage growing records made by the seed roots of every class of diameter stood in order of vertical planting]horizontal planting]reversed vertical planting. 6. On account of good sprout percentage and early stage growth, saving labor for planting and no probability of reversed planting the horizontal planting was thought as recommendable method. In. sprout and early stage growth, the reversed vertical planting was definitely inferior to the vertical planting and to the horizontal planting (p$lt;0.01). 7. 1.5㎝-diameter·horizontal planting plot was thought as the plot planted with the adquate seed root of thickness and the suitable planting method. Displaying 85.0% of sprout percentage, 27.0㎝ of leaf length, 6.6g of taps DM weight and 6.0g of roots DM weight at 8th week, the 1.5㎝-diameter·horizontal planting plot were not significantly worse in sprout percentage and early stage growth than the plots planted with the seed roots of above 1.5㎝-diameter in vertical or in horizontal method.