Fert + water + time
Yes the grass will grow from the brown stems. Depending on how much of the area you scalped it might be a good time to drop the height of cut (HOC) down lower and do a full scalp if you're wanting to maintain a lower HOC. We normally recommend aggressively scalping rather than lowering the HOC over a week or 2. That way the grass will get stressed once and it's over rather than dragging out the process over a few weeks. With it being new sod you definitely want to make sure it's rooted down good before stressing it too much.
Yes the grass will grow from the brown stems. Depending on how much of the area you scalped it might be a good time to drop the height of cut (HOC) down lower and do a full scalp if you're wanting to maintain a lower HOC. We normally recommend aggressively scalping rather than lowering the HOC over a week or 2. That way the grass will get stressed once and it's over rather than dragging out the process over a few weeks. With it being new sod you definitely want to make sure it's rooted down good before stressing it too much.
