The training of flower planting bases is usually provided by some agricultural schools, training institutions and flower planting enterprises. The following are some institutions and websites that may provide such training:

Agricultural technology extension centers: Agricultural technology extension centers all over the country usually provide various agricultural technology training courses, including flower planting courses.

Horticultural College: Horticultural College refers to a higher education institution that specializes in teaching horticultural knowledge and skills, and they also provide relevant flower cultivation training courses.

Enthusiast organizations: Some flower planting enthusiast organizations may also offer flower planting courses to improve everyone's flower planting level through activities and community sharing.

Online training websites: Some online training websites also provide courses related to flower cultivation, such as China University MOOCW course, Zhihu, Tencent classroom, etc.

I suggest you check the information of the above-mentioned institutions and websites in your area first, and consult the specific training course content, time and cost. At the same time, it will be helpful to learn some basic knowledge and skills of flower cultivation, such as the management of soil, moisture, temperature and fertilizer.