Tree Pruning Season Timing Calculator

ANA›Life Services Authority›National Calculator Authority›Tree Pruning Season Timing Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Tree Pruning Season Timing Calculator

Determine the optimal pruning window for your trees based on species type, USDA hardiness zone, and local climate conditions.

Tree Species Type

Deciduous – Dormant-season pruner (Oak, Maple, Ash) Deciduous – Spring bloomer (Dogwood, Redbud, Cherry) Deciduous – Summer bloomer (Crape Myrtle, Rose of Sharon) Evergreen Conifer (Pine, Spruce, Fir) Evergreen Broadleaf (Holly, Magnolia, Rhododendron) Fruit Tree (Apple, Pear, Peach, Plum) Tropical / Subtropical (Citrus, Avocado, Palm)

USDA Hardiness Zone

Zone 3 (−40 to −30 °F) Zone 4 (−30 to −20 °F) Zone 5 (−20 to −10 °F) Zone 6 (−10 to 0 °F) Zone 7 (0 to 10 °F) Zone 8 (10 to 20 °F) Zone 9 (20 to 30 °F) Zone 10 (30 to 40 °F) Zone 11 (40 °F+)

Current Month

January February March April May June July August September October November December

Pruning Goal

Structural / Shape Correction Dead / Diseased Wood Removal Size Reduction Maximize Flowering / Fruiting Safety / Hazard Removal

Disease Pressure in Area

Low Moderate High

Calculate Optimal Pruning Window

function trePrune() { var species = document.getElementById('tre-species').value; var zone = parseInt(document.getElementById('tre-zone').value); var month = parseInt(document.getElementById('tre-month').value); var goal = document.getElementById('tre-goal').value; var disease = document.getElementById('tre-disease').value;

// ── Zone-based season boundaries (month numbers, inclusive) ────────────── // dormancy = late-fall through late-winter; varies by zone // Zone 3-5: dormancy Nov–Mar; Zone 6-7: Dec–Feb; Zone 8-9: Dec–Jan; Zone 10-11: no true dormancy var dormStart, dormEnd, growStart, growEnd; if (zone = s && m = s || m = 2.5) { rating = 'Optimal'; ratingColor = '#2e7d32'; ratingEmoji = '✅'; } else if (finalScore >= 1.5) { rating = 'Acceptable'; ratingColor = '#f57c00'; ratingEmoji = '⚠️'; } else { rating = 'Not Recommended'; ratingColor = '#c62828'; ratingEmoji = '❌'; }

// ── Format best months ─────────────────────────────────────────────────── function formatMonths(arr) { if (!arr || arr.length === 0) return 'None'; return arr.map(function(m){ return monthName[m]; }).join(', '); }

var bestStr = (goal === 'deadwood' || goal === 'safety') ? 'Any time' : formatMonths(windows.best); var acceptStr = (goal === 'deadwood' || goal === 'safety') ? 'Any time' : formatMonths(windows.acceptable); var avoidStr = (goal === 'deadwood' || goal === 'safety') ? 'None' : formatMonths(windows.avoid);

// ── Days until next optimal window ────────────────────────────────────── var daysMsg = ''; if (finalScore '; html += 'Current Month' + monthName[month] + ''; html += 'Species Type' + document.getElementById('tre-species').options[document.getElementById('tre-species').selectedIndex].text + ''; html += 'USDA ZoneZone ' + zone + ''; html += 'Pruning Goal' + document.getElementById('tre-goal').options[document.getElementById('tre-goal').selectedIndex].text + ''; html += 'Pruning Score' + finalScore.toFixed(2) + ' / 3.00'; html += 'Rating' + ratingEmoji + ' ' + rating + ''; html += '';

html += '#### Seasonal Windows '; html += ''; html += '✅ Best Months' + bestStr + ''; html += '⚠️ Acceptable' + acceptStr + ''; html += '❌ Avoid' + avoidStr + ''; html += '';

html += daysMsg;

html += '#### Species Notes ' + windows.notes + '

'; html += '#### Goal Consideration ' + goalNote + '

'; html += '#### Disease Management ' + diseaseNote + '

';

document.getElementById('tre-result').innerHTML = html; }

#### Formula

Pruning Score = BaseScore × DiseaseFactor

#### Assumptions & References

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References

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