[LILLILEAF]

what do you use as a prevention for blossom end rot,reading a few different articles,last year first time ever my tomatoes only 1 plant got the end rot,i know my watering was in good order so calcium was the problem, do i have to buy a special calcium supplement?.

[AndyRVTR]

You can buy calcium powder or you can make your own... I use egg shells, wash, dry, crush and then blitz in my nutribullet to a powder, then I add it to compost at every potting on stage and also add ½ a handful when planting into their final stations, seems to work for me!

[Subversive_plot]

You can also supply calcium as gypsum, or as pelleted lawn lime.

Another option is calcium nitrate fertilizer.

[mumofstig]

 Over applying high-potash tomato fertilisers, can also cause BO rot - as explained here
https://www.allotment-garden.org/vegetable/how-to-grow-your-own-tomatoes/tomato-troubles-diseases-causes-cures/tomato-blossom-end-rot-causes-cures/

[LILLILEAF]

Thanks for the replies, i like the egg shell one as i have chickens, i will start collecting today .

[Oswald Bastable]

You could try a milk feed when they start to flower as a calcium supplement. 50/50 milk/water to replace a standard watering.

OB