Welcome to the Simple But How Orchard Decision Platform. Explore our 15 interactive, university extension-grounded pomological tools for fruit tree grafting compatibility, rootstock sizing, chilling hours, and pollination.
Fruit Tree Graft Compatibility Checker
Cross-reference reviewed scion and rootstock groups and see sources, cautions, interstem needs, or a clear not-covered result.
Pear & Apple Interstem Requirement Checker
Screens selected pear-on-quince combinations for a commonly recommended compatibility bridge and explains where local verification is still needed.
Grafting Method Selector by Wood Caliper & Season
Guides you to Whip & Tongue, Cleft, Bark Inlay, or T-Budding based on scion-to-rootstock caliper ratio and tree phenology.
General Zone-and-Month Grafting Planner (Phenology Guide)
Generates month-by-month phenological action plans and temperature parameters across all 12 calendar months.
Graft Callus Temperature Range Estimator
Screens holding temperature against practical healing bands for apples, pears, stone fruit, citrus, grapes, and figs.
Scion-to-Rootstock Caliper Match Calculator
Uses a visible cut-length heuristic and explains alignment choices for equal or unequal scion and rootstock diameters.
Dormant Scionwood Storage Risk & Viability Checker
Flags ethylene bud abortion, botrytis mold decay, and desiccation risks in home and commercial refrigerator setups.
Grafting Tape Length & Dispense Range Estimator
Calculates unstretched tape strip lengths with 50% spiral overlap parameters for standard 2-inch graft unions.
Apple Rootstock Selector by Soil Texture & Stature
Screens rootstock options against drainage, support, vigor, and disease-pressure priorities without promising a site outcome.
Mature Fruit Tree Height & Canopy Sizer
Replaces arbitrary numbers with realistic planning ranges (e.g. 8–11 ft for M.9) accounting for soil and pruning.
Apple Pollination & S-Allele Compatibility Matrix
Compares diploid or triploid status, shared S-alleles, and likely bloom overlap, then explains the limits of the result.
Fruit Tree Orchard Spacing & Density Calculator
Uses entered plot dimensions, setbacks, row spacing, service alleys, and tree spacing instead of returning a fixed preset.
Fruit Tree Chill Requirement Checker
Compares a user-supplied chill-hours value with listed apple, peach, cherry, pear, fig, or citrus thresholds and explains model limits.
Cherry & Stone Fruit Clonal Rootstock Compatibility Matrix
Flags reviewed incompatible groups and compares approximate vigor, soil adaptation, support, and management needs.
Citrus Grafting & T-Budding Seasonal Calendar
Maps likely spring and late-summer budding windows and puts citrus budwood biosecurity first.
Evidence Standards & Calculation Methodology
Our calculation engines query deterministic botanical matrices cross-referenced against research from the USDA ARS Plant Genetic Resources Unit, University of California ANR, WSU Tree Fruit Extension, and UF/IFAS Extension.