Although the money is not enough, Mary has been supplementing it from her farm.
The NICHE programme has evidence showing that cash-plus interventions - combining cash with provision of services - have greater impact than cash payments alone.
The beneficiaries get additional cash, nutrition services and child protection counselling to facilitate positive behaviour change and reduce vulnerability from trained Community Health Volunteers (CHVs) via home-based counselling.
Lucia Mwende, a CHV based in Kitui South, goes around villages educating families on good nutrition, sanitation and other baby-friendly activities.
"If the woman is pregnant, I teach her what food groups to eat, how to take care of unborn child and the importance of ante-natal clinics," explains Mwende. "For those with young children, I will teach them the importance of exclusive breastfeeding, when and how to wean her child."
Mwende also trains young mothers on budgeting, saving or investing money received from NICHE.
Ndanu Mutati, Matuku's daughter-in-law, has been using the cash to improve diet, supplementing with money made through selling of chicken, which she began rearing in their homestead.
Mosomi says funding for nutrition can be done by increasing the budgetary allocation for social protection from 0.35 per cent of national GDP to at least 1.7 per cent.
This means Kenya needs to spend at least Sh554 billion annually to be at par with lower-middle-income countries which spend up to 1.5 per cent of their GDP on social protection.
"The government can increase other interventions alongside cash transfer and by allocating a proportionate amount of money which goes to nutrition programming to be able to achieve more," says Mosomi.