Firstly, please check that the promotion code is still valid and that you are typing in the correct code.
Due to the number of discount codes Seedsman offers you are able to only use one discount at the same time. There are often rules to promotions, so please make sure you have followed the requirements outlined.
We are also unable to offer any further discount to payment discounts.
Products on sale
Products marked as on sale do not get any further discounts from coupon/promo codes.