You need Cal Nitrate
Calcium Nitrate – YaraLiva Yara’s comprehensive range of calcium nitrates that help ensure high-value, highly marketable produce, are called YaraLiva. YaraLiva calcium nitrates provide fast-acting nitrate-N, alongside strength-building calcium. In combination, these nutrients fuel prolonged...
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and Epson salts. That you can buy anywhere local.
If you buy the big bags it makes it quite cheap to use. I use it from start to finish.
For mixing a 5 gallon bucket I use
18g of 5-12-26
12g of 15-0-0
6g of epson salts
So a 25lb bag of 5-12-26 is 630 buckets or 3150gallons at full strength
11.34 KG bag of jacks 84.99
10kg bag of Cal Nit 15-0-0 34.99
is $119.98 plus tax
for me thats
$135.58 add $10 for epson salts.
$145.48 that's 21cents a gallon with a few pounds of cal nit left over.
Cheers
CCG