"We are saying 3.8% growth is an underestimate. The growth should be higher than that and close to 6%," Ncube told an online briefing.
In a cabinet statement this week, the government said it expected to harvest 2.3 million tons of maize this year, a 58% jump from the previous season driven by favorable rains.
"What we mainly did this week was to recognise the strong recovery in the agricultural sector where we have seen 54% growth, at least in the grains sub-sector. We are seeing a 35% growth in the non-food sector," Ncube said.
The minister said improved generation at the Hwange coal plant and the Kariba hydroelectric station should help improve electricity availability.
He downplayed the likelihood of the government overspending given this year's general election, saying the target was still for the overall fiscal deficit to be 1.5% of gross domestic product, the same as forecast in November.