@Jumba Milkzadick please check below is a list of certified seed producers you may contact any depending on variety and location.
1. Limuru - Edward Mbugua – Tigoni, Dutch - Sherekea & Kenya Mpya - 0722 734 919
2. Limuru – Mr. James Mburu – Tigoni - 0723 078 218
3. Limuru – Mrs Anne W. Ng'ang'a – Tigoni, Sangi and Dutch - 0726 288 046
4. Molo - Ann Mbugua - Sangi, Kenya Mpya and Dutch - 0722 691 245
5. Nyandarua - Njabini A.T.C - Sangi - 0733 834 425
6. Nyeri - Wambugu A.T.C – Sangi - 0722 599 764
7. Meru - Kisima farm - Tigoni, Asante, Kenya Mpya& Sherekea - 0721 325 269
8. Nyahururu - David Kipkoech - Sangi, Dutch and Tigoni - 0722 460 649
9. Nyandarua - Oljoroorok A.T.C - Kenya Mavuno 0714 028 024
10. Nyeri - Stephen Wachira - Sangi and Dutch - 0722 680 799
11. Nyandarua - James Muendo - Sangi 0722 959 184
12. Molo - Mary Wanja - Dutch, Tigoni and Kenya Mpya 0721 673 830
13. Limuru - Stephen Karanja - Kenya Mpya, Sherekea and Tigoni - 0721 265 814
14. Nyeri - Alice Gathekia - Sangi and Dutch varieties 0733 192 349
(Source: KARI National Potato Centre - Tigoni, Limuru. Tel. 0733 834 675).