Ogborn said the timing for the introduction of the drop-in pitch to internationals has not been finalised, and will depend on the success of the March 1-4 Plunket Shield match.
Napier is expected to be among the candidates for a test during a tour by England later this year.
Amid conjecture that growing conditions may have delayed the introduction of the pitch, Ogborn said: "We need to ensure the quality of the drop-in pitches prior to playing international games on them and this is the basis of retaining the block for now.
"We also have a reputation for producing a very good wicket at McLean Park, and we don't want to compromise this with hasty removal of the block," he said.
"We could have tested one drop-in pitch, but it would then have been swapped out meaning playing on another untested drop-in, and there would not have been time to renovate the drop-in pitch between the domestic or Sri Lanka warm-up and the India game."
He said introduction of the pitch for international cricket will depend on the schedule for next season, and added: "It may be that we can play on the drop-in pitch tested during the Plunket Shield on March 1-4 this year for an international next year.
"We are very happy with the way the drop-in pitch is shaping up – it is a new clay combination that is testing very well."
Comment from Cricket New Zealand was not available by late yesterday.