Sanitarium says repairs to its Christchurch factory are progressing well, but Marmite is unlikely to hit shelves again this month.
The popular spread was meant to be back on sale in July, but this was pushed back to October.
The factory, which is the only one in New Zealand to produce Marmite, was closed late last year as a result of earthquake damage.
Sanitarium now says reconstruction of the factory is almost complete.
"We still have some final interior work to complete before the repair and recommissioning of our production line throughout October/November so that the time-honoured craft of making and blending Marmite can begin.
"There will be a time lapse between the start of production and the availability of product on-shelf.
"We have not set a back-on-shelf date yet as we anticipate we will have some production hurdles to overcome."