Seedlings were grown in solution and sand cultures to determine approximate ionic concentration and salt ratios suitable for growth. Three total salt concentrations were used, 0.0021N, 0.0084N, and 0.0336N,[long dash]in 3 salt combinations, (a) K2SO4, CaH4(PO4)2, and Mg(NO3)2, (b) KNO3, CaSO4, and MgH4(PO4)2, and (c) KH2PO4, Ca(NO3)2, and MgSO4. Records were kept of H-ion concentration and transpiration. A very favorable salt concentration was 0.0084N, with ionic ratios of 5, 3, 4 for K, Ca and Mg, respectively, and 5, 9, 4 for NO3, PO4, and SO4 respectively. A solution of this concentration and composition produced favorable growth when the H-ion concentration was less than p H 3.6. High phosphate concentrations tended to produce chlorosis. No evidence was secured to justify the application of the term calciphobe to Lupinus albus.