maintenance equipment. Group agreed. PLANTING PLAN 1 Annette How about: A minimum of one tree, three shrubs and three herbaceous species shall be – incorporated in the bioretention planting plan unless it is a grassed cell. A recommended planting density is 400 stems per acre. Brian L This should be a recommendation. – Robert Not worded well trees, shrubs vs species, any combination of these? – – Brian L For water quality purposes, does it really matter? – Annette What if we wanted it to be more outcome oriented? – Bill H Plants are important. Roots are particularly important. – Peter Should it be plants of certain root depths? Not the top of plants that matter should be root – – parts. Bill H Mm hmm. Let’s come back to the Team on this later. – Todd Keep in mind maintenance requirements. It’s hard to image a system working in perpetuity if – you have to take a big tree out to do maintenance. Annette Trees love water and will go for that underdrain, clog it up. Bill and I will work on this. – PLANTING PLAN 2 Annette: How about: Plant size shall be no less than 2.5” dbh for trees, 3 gallons for shrubs, and 1 quart for herbaceous plants. Annette Bill and I will tackle 18-22 and bring back to Team. – MULCH 1 Group agreed to strike this. 2 Brian L Will be a headache if mulch washes away. – Robert I think we should require this. – Rob W Do you always buy your own mulch, not make it yourself? Why does it have to be commercially – available? Brian L Let’s lose available.” – “commercially Robert Do we want to specify that this does not apply to grass cells? – Annette How about: For tree/shrub bioretention cells, double or triple shredded hardwood mulch – shall be used for the portion of the cell that will be inundated. (Explain in manual because it is less – likely to be washed away.) Group agreed. MULCH 3 For tree/shrub bioretention cells, mulch shall be uniformly placed 2-4 inches deep. (In chapter, mulch should be renewed as needed to maintain a 2-4 inch depth until the plants create their own mulch layer.) Group agreed
maintenance equipment. Group agreed. PLANTING PLAN 1 Annette – How about: A minimum of one tree, three shrubs and three herbaceous species shall be incorporated in the bioretention planting plan unless it is a grassed cell. A recommended planting density is 400 stems per acre. Brian L – This should be a recommendation. Robert – Not worded well – trees, shrubs vs species, any combination of these? Brian L – For water quality purposes, does it really matter? Annette – What if we wanted it to be more outcome oriented? Bill H – Plants are important. Roots are particularly important. Peter – Should it be plants of certain root depths? Not the top of plants that matter – should be root parts. Bill H – Mm hmm. Let’s come back to the Team on this later. Todd – Keep in mind maintenance requirements. It’s hard to image a system working in perpetuity if you have to take a big tree out to do maintenance. Annette – Trees love water and will go for that underdrain, clog it up. Bill and I will work on this. PLANTING PLAN 2 Annette: How about: Plant size shall be no less than 2.5” dbh for trees, 3 gallons for shrubs, and 1 quart for herbaceous plants. Annette – Bill and I will tackle 18-22 and bring back to Team. MULCH 1 Group agreed to strike this. 2 Brian L – Will be a headache if mulch washes away. Robert – I think we should require this. Rob W – Do you always buy your own mulch, not make it yourself? Why does it have to be commercially available? Brian L – Let’s lose “commercially available.” Robert – Do we want to specify that this does not apply to grass cells? Annette – How about: For tree/shrub bioretention cells, double or triple shredded hardwood mulch shall be used for the portion of the cell that will be inundated. (Explain in manual – because it is less likely to be washed away.) Group agreed. MULCH 3 For tree/shrub bioretention cells, mulch shall be uniformly placed 2-4 inches deep. (In chapter, mulch should be renewed as needed to maintain a 2-4 inch depth until the plants create their own mulch layer.) Group agreed
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