The Welsh county won three of 16 games in the County Championship Division Two last season and failed to make progress in the limited overs competitions.
Mott is in the third and final year of contract as Glamorgan's head of elite performance.
"You do feel in the third year that you should see the fruits of your labour," said Mott.
"We have built a squad over the last couple of years and this is the year where we should be looking to improve a helluva lot.
"Last year, we made some improvements towards the back end, but it was too little, too late.
"This month of April is very important for everyone at the club and in Wales. We have to start to show what we have got."
Glamorgan lost James Harris, who is one of four uncapped players in England's ICC Champions Trophy provisional squad, after he agreed to join Middlesex on a three-year contract at the end of last season.
Veteran Robert Croft also retired after 23 seasons with the Welsh county.
Seam bowler Harris triggered a clause in his contract that allowed him to leave Glamorgan, who gave him his first-class debut as a 16-year-old in 2007, if the Welsh county were not in the top tier.
Mott has returned from a 10-day pre-season tour of South Africa with Glamorgan and is convinced his squad are ready to learn the lessons of  last seasons's disappointing campaign.
"We need to improve across the board," said Mott.
"A realistic goal is to win more games than we lose and we didn't get close to that last year.
"If we get close to that, just like any side in this division, it can come down to the last couple of games and you are challenging, but we have to start the season better.
"We finished well last season but our start really killed us and our promotion aspirations."
Glamorgan have added Australian bowler Michael Hogan and Zimbabwean batsman Murray Goodwin to their squad this year.
Australian Marcus North is to lead the one-day side, while his countryman, pace bowler Dirk Nannes, has been signed to play in the Friends Life T20.
On Friday, Glamorgan play their final pre-season friendly with a three-day match against Cardiff MCCU.
Their first game of the season is against Northamptonshire in the County Championship in Cardiff on Wednesday.

The West End singer and presenter has previously won two Oliviers - for best actor in a musical in 2008 for Hairspray and in 2013 for Sweeney Todd.
The Olivier Awards, which are celebrating their 40th anniversary this year, will be held at London's Royal Opera House on 3 April.
Ball will also be hosting the nominations announcement, taking place at noon on 29 February.
The announcement will be streamed live at www.olivierawards.com.
Ball, who was made an OBE last month, previously co-hosted the awards in 2011 and 2012.
Last year's big winners were Kinks-inspired musical Sunny Afternoon and drama A View From the Bridge, with Dame Angela Lansbury winning her first Olivier Award for her role as Madame Arcati in Blithe Spirit, her first West End role in nearly 40 years.
Voting opened on Tuesday for the Magic Radio Audience Award, the only Olivier voted on by the public.
The 16 shows in the running for the award are: Beautiful - The Carole King Musical; Charlie and the Chocolate Factory; The Curious Incident of the Dog in the Night-Time; Jersey Boys; Disney's The Lion King; Mamma Mia!; Matilda the Musical; Les Miserables; The Mousetrap; The Phantom of the Opera; The Railway Children; Stomp; Sunny Afternoon; The Play that Goes Wrong; The Woman in Black and Thriller Live.
Glamorgan chief Matthew Mott says he expects his side to secure vastly improved results this season.
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Michael Ball is to host this year's Olivier Awards, it has been announced.