In Ground Tree Fertilizer for Cold-Hardy Trees
$37.99
š² Old Cobblers Farm⢠Wicked Plant Growth In-Ground Tree Fertilizer for Cold-Hardy Trees (5-10-10 NPK) āļø
When your trees face freezing winters and tough conditions, give them the strong start they need with Old Cobblers Farm⢠Wicked Plant Growth In-Ground Tree Fertilizer for Cold-Hardy Trees. Our expertly balanced 5-10-10 formula delivers essential phosphorus and potassium to strengthen root systems and enhance stress resistance, helping your trees endure and thrive through the harshest seasons.
š³ Best Trees to Use This Fertilizer With
Formulated for trees that need added resilience and strong roots in cooler climates:
Sugar Maple (Acer saccharum)
Red Maple (Acer rubrum)
Norway Spruce (Picea abies)
White Spruce (Picea glauca)
Eastern White Pine (Pinus strobus)
Douglas Fir (Pseudotsuga menziesii)
Blue Spruce (Picea pungens)
American Beech (Fagus grandifolia)
Northern Red Oak (Quercus rubra)
White Oak (Quercus alba)
Black Walnut (Juglans nigra)
American Linden (Tilia americana)
Paper Birch (Betula papyrifera)
Quaking Aspen (Populus tremuloides)
Balsam Fir (Abies balsamea)
Eastern Hemlock (Tsuga canadensis)
Red Pine (Pinus resinosa)
Hackberry (Celtis occidentalis)
Shagbark Hickory (Carya ovata)
Tamarack (Larix laricina)
š§Ŗ How to Apply
Application Frequency
Spring: Apply in early spring as the ground thaws and before new growth begins
Fall: Apply again in early fall, 6ā8 weeks before the first frost
Recommended Quantity
Young Trees (1ā3 years old): ¼ lb per inch of trunk diameter (measured at 4.5 ft height)
Mature Trees (4+ years): ½ lb per inch of trunk diameter
Steps to Apply
Measure Tree Diameter: Use measuring tape at chest height (4.5 ft)
Clear Base Area: Remove grass, weeds, and debris from the root zone
Loosen Soil: Use a garden fork or trowel to aerate the soil around the drip line
Spread Fertilizer: Apply evenly around the drip lineānot against the trunk
Water Thoroughly: Activate nutrients and help them reach the roots
š Optimal Soil Conditions
Soil pH: 6.0ā7.0 (slightly acidic to neutral)
Moisture: Moist but well-drainedānever soggy or waterlogged
Soil Type: Loamy soil is best; amend sandy soils with compost, and clay soils with organic matter and sand
Organic Matter: Enrich with compost or aged manure to improve nutrient retention and microbial health
Preparation: Remove debris, loosen the soil, and prepare for even distribution of nutrients
Temperature: Apply when soil is above 50°F for optimal nutrient uptake
Pro Tip from the Farm:
Cold-hardy trees need strong roots to survive harsh wintersādonāt skip the fall feeding. Itās the secret to a healthier spring flush and stronger, more resilient growth year after year.
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