Comprising a range of gardening products, the kits have enabled participating schools to start growing their own fruit and vegetables from scratch.
Inside every kit are three varieties of vegetable seeds from Pippa Greenwood’s own range.
Compost has been donated by participating garden centres and professional grower's specialist, J Arthur Bowers. Pupils have received a booklet produced by Stewart Garden.
The kit also includes scoopes, potting trays, premium seed trays, propagator sets, plant pots, troughs, and watering cans.
In total, 100 schools across the UK, from the Isle of Wight to Stirling, are taking part.
The aim of the competition, which was first launched in 2012, is to encourage pupils to get involved in grow your own.
In 2013, 95 schools took part, with the winning prize going to Lough View Integrated Primary School in Belfast.
Also supporting the Stewart Garden Schools Campaign 2014 is the global electronics company, Brother, who has supplied its sophisticated GL200 garden label printer.
The top 10 schools will receive a visit from the judges, whose feedback will be collated, and the winner will be announced in September 2014.
The winning school will receive £1,100 to be spent at their local garden centre. Nine runners up will each receive £500, with £100 of each prize being donated by J Arthur Bowers.