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Transcript
Comments for pH, lime and sulfur recommendations These apply to all ornamentals samples – homeowner, commercial landscape and commercial field nursery (Deciduous trees and shrubs) If pH is 5.5 - 6.5: An appropriate pH range for most deciduous trees and shrubs is 5.5-6.5. No lime is recommended at this time. If pH is less than 5.5: An appropriate pH range for most deciduous trees and shrubs is 5.5-6.5. To lime to pH 6.0, apply and incorporate ___ lbs calcitic lime or ___ lbs dolomitic lime per 1000 square feet. Dolomitic lime contains magnesium in addition to calcium, and should be used if the soil test indicates low or very low magnesium levels. Where possible, lime should be incorporated in the top 6" of soil before planting. If applying lime to established plantings, broadcast it on the soil surface and rake it in lightly. If pH is over 6.5: An appropriate pH range for most deciduous trees and shrubs is 5.5-6.5. No action is necessary if plants are growing satisfactorily and appear healthy. If trees and shrubs develop signs of chlorosis (yellowing) on young leaves, you may wish to try to reduce the pH with sulfur. To lower the pH to 6.0, apply _____ lbs elemental sulfur per 1000 square feet. Where possible, sulfur should be incorporated into the top 6" of soil before planting. If applying sulfur to established plantings, do not exceed a rate of 10-20 lbs per 1000 square feet per application. Broadcast it on the soil surface and water it in immediately. Reapply after 3-4 weeks if necessary. If soils contain large amounts of calcium or magnesium carbonates, reduction of pH with sulfur will be minimal and short-lived. The best strategy for these soils is to select plants that tolerate high pH. (Evergreen trees and shrubs) If pH is 5.0 - 6.0: An appropriate pH range for most narrowleaf evergreen trees and shrubs (conifers) is 5.06.0. No lime is recommended at this time. Exceptions are arborvitae, taxus (yew), and Colorado blue spruce which prefer a pH of 6.0 – 7.0. For these plants, lime to pH 6.5 by applying and incorporating ___ lbs calcitic lime or ___ lbs dolomitic lime per 1000 square feet. Dolomitic lime contains magnesium in addition to calcium, and should be used if the soil test indicates low or very low magnesium levels. Where possible, lime should be incorporated in the top 6" of soil before planting. If applying lime to established plantings, broadcast it on the soil surface and rake it in lightly. 1 If pH is less than 5.0: An appropriate pH range for most narrowleaf evergreen trees and shrubs (conifers) is 5.06.0. To lime to pH 6.0, apply and incorporate ___ lbs calcitic lime or ___ lbs dolomitic lime per 1000 square feet. Exceptions are arborvitae, taxus (yew), and Colorado blue spruce which prefer a pH of 6.0 – 7.0. To lime to pH 6.5, apply and incorporate ___ lbs calcitic lime or ___ lbs dolomitic lime per 1000 square feet. Dolomitic lime contains magnesium in addition to calcium, and should be used if the soil test indicates low or very low magnesium levels. Where possible, lime should be incorporated 6-8" deep before planting. If applying lime to established plantings, broadcast it on the soil surface and rake it in lightly. If pH is over 6.0: An appropriate pH range for most narrowleaf evergreen trees and shrubs (conifers) is 5.06.0. Exceptions are arborvitae, taxus (yew), and Colorado blue spruce which prefer a pH of 6.0 – 7.0. No action is necessary if plants are growing satisfactorily and appear healthy. If trees and shrubs develop signs of chlorosis (yellowing) or red needles, you may wish to try to reduce the pH with sulfur. To lower the pH to 6.0, apply _____ lbs elemental sulfur per 1000 square feet. Where possible, sulfur should be incorporated into the top 6" of soil before planting. If applying sulfur to established plantings, do not exceed a rate of 10-20 lbs per 1000 square feet per application. Broadcast it on the soil surface and water it in immediately. Reapply after 3-4 weeks if necessary. If soils contain large amounts of calcium or magnesium carbonates, reduction of pH with sulfur will be minimal and short-lived. The best strategy for these soils is to select plants that tolerate high pH. (Broadleaf evergreens such as rhododendrons, azaleas, pieris, leucothoe and other ericaceous plants) If pH is 4.5 - 5.5: An appropriate pH range for broadleaf evergreens is 5.5-6.5. No lime is recommended at this time. If pH is less than 4.5: An appropriate pH range for most narrowleaf evergreen trees and shrubs (conifers) is 4.55.5. To lime to pH 5.0, apply and incorporate ___ lbs calcitic lime or ___ lbs dolomitic lime per 1000 square feet. Dolomitic lime contains magnesium in addition to calcium, and should be used if the soil test indicates low or very low magnesium levels. Where possible, lime should be incorporated in the top 6" of soil before planting. If applying lime to established plantings, sprinkle it evenly on the soil surface. 2 If pH is over 5.5: An appropriate pH range for most broadleaf evergreens is 4.5-5.5. However, no adjustment is necessary if plants are growing satisfactorily and appear healthy. If shrubs develop signs of chlorosis (yellowing) on young leaves, you may wish to try to reduce the pH with sulfur. To lower the pH, apply _____ lbs elemental sulfur per 1000 square feet. Where possible, sulfur should be incorporated into the top 6" of soil before planting. If applying sulfur to established plantings, do not exceed a rate of 10-20 lbs per 1000 square feet per application. Broadcast it on the soil surface and water it in immediately. Reapply after 3-4 weeks if necessary. If soils contain large amounts of calcium or magnesium carbonates, reduction of pH with sulfur will be minimal and short-lived. The best strategy for these soils is to select plants that tolerate high pH. (Annuals and Perennials) If pH is 5.8 - 6.5: An appropriate pH range for most annuals and perennials is 5.8-6.5. No lime is recommended at this time. If pH is less than 5.7: An appropriate pH range for most annuals and perennials is 5.8-6.5. To lime to pH 6.5, apply and incorporate ___ lbs calcitic lime or ___ lbs dolomitic lime per 1000 square feet. Dolomitic lime contains magnesium in addition to calcium, and should be used if the soil test indicates low or very low magnesium levels. Where possible, lime should be incorporated in the top 6" of soil before planting. If applying lime to established plantings, broadcast it on the soil surface and rake it in lightly. If pH is over 6.5: An appropriate pH range for most annuals and perennials is 5.8-6.5. Before planting a new flower bed, lower the pH to 6.0 by incorporating _____ lbs elemental sulfur per 1000 square feet. Work it in to the top 6 inches of soil. For established perennials, no adjustment is necessary if plants are growing satisfactorily and appear healthy. If plants develop signs of chlorosis (yellowing) on young leaves, you may wish to try to reduce the pH with sulfur. To lower the pH to 6.0, apply _____ lbs elemental sulfur per 1000 square feet. Where possible, sulfur should be incorporated before planting. If applying sulfur to established plantings, do not exceed a rate of 10-20 lbs per 1000 square feet per application. Broadcast it on the soil surface and water it in immediately. Reapply after 3-4 weeks if necessary. If soils contain large amounts of calcium or magnesium carbonates, reduction of pH with sulfur will be minimal and short-lived. The best strategy for these soils is to select plants that tolerate high pH. 3