I had no clue about this

Different calcium sources vary in their effectiveness and application methods. Calcium nitrate is a water-soluble fertilizer that provides a quick calcium boost but requires careful application to avoid over-fertilization. Gypsum is a good option for improving soil structure and providing calcium without altering pH levels. Lime not only supplies calcium but also raises soil pH, which can be beneficial in acidic soils. Antacid tablets offer a convenient, albeit slower, release of calcium. Each option has its pros and cons, and the best choice depends on your specific soil conditions and gardening practices.