Sure.
Calcium nitrate:
https://www.amazon.com/Southern-Ag-Calcium-Nitrate-Pound/dp/B0013LQJKU/ref=asc_df_B0013LQJKU/?tag=hyprod-20&linkCode=df0&hvadid=193139379506&hvpos=&hvnetw=g&hvrand=7459113312015891678&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9009984&hvtargid=pla-312930845675&psc=1
Magnesium sulfate:
https://www.walmart.com/ip/Equate-Epsom-Salt-Magnesium-Sulfate-64oz-4lb-Scent-Free/912406734?athcpid=912406734&athpgid=AthenaItempage&athcgid=null&athznid=si&athieid=v0&athstid=CS004&athguid=L7qe-TqIN5Y_dxVE5p17u1W4FnB4brgK9dzv&athancid=null&athena=true&athbdg=L1102