| HS 400 | Residential Landscaping | 6 | |
| HS 410 | Community Food Systems | 3 | |
| HS 411 | Nursery Management | 3 | |
| HS 416 | Planting Design | 4 | |
| HS 418 | Digital Media Graphic for Landscape Designers | 3 | |
| HS 420 | Green Infrastructure | 3 | |
| HS 421 | Temperate-Zone Tree Fruits: Physiology and Culture | 3 | |
| HS 422 | Small Fruit Production | 3 | |
| HS 423 | Viticulture | 3 | |
| HS 428 | Service-Learning in Urban Agriculture Systems | 1 | |
| HS 431 | Vegetable Production | 4 | |
| HS 432 | Introduction to Permaculture | 3 | |
| HS 433 | Public Garden Administration | 3 | |
| HS 440 | Greenhouse Management | 3 | |
| HS 442 | Floriculture Crop Production | 3 | |
| HS 451 | Plant Nutrition | 3 | |
| HS 462 | Postharvest Physiology | 3 | |
| HS 471 | Landscape Ecosystem Management | 4 | |
| HS 475 | Horticulture Entrepreneurship | 3 | |
| HS 476 | Crop Physiology and Production in Controlled Environments | 3 | |
| HS 480 | Sustainable Food Production (capstone) | 1 | |
| HS 491 | Sustainable Agriculture Entrepreneurship Study Abroad | 3 | |
| HS 492 | Horticulture Internship | 1-3 | |
| HS 493 | Research Experience in Horticultural Science | 1-3 | |
| HS 494 | Teaching Experience in Horticultural Science | 1-3 | |
| HS 495 | Experimental Courses in Horticultural Science | 1-6 | |
| HS 502 | Plant Disease: Methods & Diagnosis | 2 | |
| HS 516 | Planting Design | 4 | |
| HS 520 | Green Infrastructure | 3 | |
| HS 521 | Temperate-Zone Tree Fruits: Physiology and Culture | 3 | |
| HS 523 | Viticulture | 3 | |
| HS 532 | Introduction to Permaculture | 3 | |
| HS 533 | Public Garden Administration | 3 | |
| HS 541 | Plant Breeding Methods | 3 | |
| HS 550 | Environmental Nursery Production | 3 | |
| HS 551 | Plant Nutrition | 3 | |
| HS 562 | Postharvest Physiology | 3 | |
| HS 576 | Crop Physiology and Production in Controlled Environments | 3 | |
| HS 583 | Advanced Floral Crop Production and Handling | 3 | |
| HS 590 | Special Problems in Horticultural Science | 1-6 | |
| HS 601 | Professional Presentation Skills in Horticultural Science | 2 | |
| HS 610 | Special Topics in Horticultural Science | 1-6 | |
| HS 615 | Advanced Special Topics | 1-6 | |
| HS 685 | Master's Supervised Teaching | 1-3 | |
| HS 688 | Non-Thesis Masters Continuous Registration - Half Time Registration | 1 | |
| HS 689 | Non-Thesis Master Continuous Registration - Full Time Registration | 3 | |
| HS 690 | Master's Examination | 1-9 | |
| HS 693 | Master's Supervised Research | 1-9 | |
| HS 695 | Master's Thesis Research | 1-9 | |
| HS 696 | Summer Thesis Research | 1 | |
| HS 699 | Master's Thesis Preparation | 1-9 | |
| HS 701 | Plant Metabolism | 1 | |
| HS 702 | Biology of Plant Hormones | 1 | |
| HS 703 | Breeding Asexually Propagated Crops | 1 | |
| HS 704 | Plant Nomenclature | 1 | |
| HS 705 | Physiology Of Flowering | 1 | |
| HS 706 | Fruit Development and Postharvest Physiology | 1 | |
| HS 707 | Environmental Stress Physiology | 1 | |
| HS 716 | Weed Biology | 3 | |
| HS 717 | Weed Management Systems | 1 | |
| HS 720 | Molecular Biology In Plant Breeding | 3 | |
| HS 725 | Pesticide Chemistry | 1 | |
| HS 727 | Pesticide Behavior and Fate In the Environment | 2 | |
| HS 729 | Herbicide Behavior In Plants | 2 | |
| HS 745 | Quantitative Genetics In Plant Breeding | 1 | |
| HS 746 | Cytogenetics in Plant Breeding | 2 | |
| HS 757 | Quantitative Genetics Theory and Methods | 3 | |
| HS 790 | Special Problems in Horticultural Science | 1-6 | |
| HS 815 | Advanced Special Topics | 1-6 | |
| HS 860 | Plant Breeding Laboratory | 1 | |
| HS 861 | Plant Breeding Laboratory | 1 | |
| HS 885 | Doctoral Supervised Teaching | 1-3 | |
| HS 890 | Doctoral Preliminary Examination | 1-9 | |
| HS 893 | Doctoral Supervised Research | 1-9 | |
| HS 895 | Doctoral Dissertation Research | 1-9 | |
| HS 896 | Summer Dissertation Research | 1 | |
| HS 899 | Doctoral Dissertation Preparation | 1-9 | |