Sue Allen, trust chairman, said: "We were delighted to give our annual award to Sian and would also like to thank Carol for being there to present the certificate and prize of £100 on our behalf.
"This is one of several annual awards made by our Trust to students at our leading horticulture colleges. In addition the Trust also supports students of horticulture by making grants on an annual basis to help with course fees and other costs.
"To add to this, this year also sees the launch of our new initiative to encourage young or potential management team members within garden centres to visit centres in Europe for up to two weeks. Information about this scheme, which is called the Dick Allen Travel Award, and the other grants available through the GCA Trust can be found on our website www.gca.org.uk."
Davis has recently completed her course at Capel Manor College.
She said: "I was delighted to have won this award for plant identification.
"I would like to say a huge 'thank you' to all at the GCA Trust for sponsoring this award. As an adult learner returning to studying, it was really great to receive an award in recognition of all the hard work I have put in. I am now really looking forward to starting my career in horticulture."