Burnet's Plant Health Sequestron Fertiliser 250ml Black SKU: 139457 MODEL: ZSEQ250 Error. try again later You've successfully joined the club $ 14 .98 each Available on orders $50 to $1500. More info × Mitre 10 Variants Food for acid loving plants. Features and benefits Magnesium. Deficiencies. Sequestron. Chelated. Chlorosis. Liquid.