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b. sugar maple — this species does best on sites which have a loamy soil with <br />generous amounts of organic matter. Very sandy or heavy clay soils are <br />not suitable for growth of sugar maple. In those types of soils, limit use of <br />sugar maple and plant cultivars of red maple or "Freeman" maples instead. <br />Discover Crossing Planting Plan Review — 4/11/06 — 2 <br />c , Colorado (green and blue) spruce — Colorado spruce is not native to <br />Minnesota and suffers site stresses which make it susceptible to several <br />serious fungal diseases as it ages. Limit the use of Colorado spruce and <br />substitute some Black Hills' white spruce, white pine, and site -tolerant <br />non- <br />native species such as Norway spruce, or concolor fir instead. <br />d. Amur maple — this large shrub/small tree is becoming more of a problem <br />in <br />regard to invading native woodlands, due to its prolific seed production <br />and <br />its tolerance of a wide range of sites. It is a beautiful plant which <br />establishes <br />well, but should be used sparingly. Substitute serviceberry, pagoda <br />dogwood, viburnums and black chokeberry for some of the Amur maple. <br />Serviceberry and pagoda dogwood do particularly well in semi -shaded <br />locations. Dwarf bushhoneysuckle is a native shrub which is smaller but <br />does well in a wide range of site conditions. <br />e. Crabapple cultivars —'Pink Spire', `Radiant' and `Snowdrift' are <br />susceptible to the fungal disease, apple scab, which can make flowering <br />crabs high maintenance plants. Use more disease -resistant varieties such <br />as <br />`Professor Sprenger', `Prairie Fire', `Thunderchild' and `Indian Summer'. <br />3. Tree Protection <br />Soil disturbance around roots of trees to be saved should be limited as much as <br />possible to avoid permanently damaging trees which the developer intends to save. I <br />see little protective fencing being used on site. What means are being (will be) used <br />to protect trees from construction impacts? The Planting Plan contains the following <br />note regarding Existing Trees "field verify and flag trees to be protected and saved <br />with Owner and Consultant". Has this been done for the development phase or it is <br />only being done at the individual lot level? Does "Consultant" refer to a consultant <br />hired by the development company or the Lake Elmo Forestry Consultant? Trees to <br />be retained in any phase of development should be protected and fenced out to their <br />branch spread, if possible. It is much more effective to protect trees during <br />