| HS 502 | Plant Disease: Methods & Diagnosis | 2 |
| HS 516 | Landscape Planting Design | 4 |
| HS 520 | Green Infrastructure | 3 |
| HS 521 | Temperate-Zone Tree Fruits: Physiology and Culture | 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 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 | 1-6 |
| 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 703 | Breeding Asexually Propagated Crops | 1 |
| HS 704 | Plant Nomenclature | 1 |
| HS 705 | Physiology Of Flowering | 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 895 | Doctoral Dissertation Research | 1-9 |
| HS 896 | Summer Dissertation Research | 1 |
| HS 899 | Doctoral Dissertation Preparation | 1-9 |
