版主终于回帖了。多谢哈。我和一个专业公司联系了，他们建议我现在什么都不管，到明天开春再说。我也不知如何是好。蒲公英 is not a big deal. They wouldn't live over the winter. I usually don't pull them. Just mow them down, The key is mow them before they seed. When you see flowers, mow them. For the strongest one I would use weed killer like roundup to kill them.
蒲公英 grow faster then grass but don't take mowing very well.
Grass would take mowing and would out compete 蒲公英 if you put seeds, fertilizing and watering.
So if 蒲公英 is your only problem. You should buy grass seeds, fertilizer . rake the lawn off dead grass , expose the soil, spread the seeds and rake again make sure seeds are mixed in with soil, spread fertilizer then water.
Most lawn go bad is because the owner did not do the basic, seeding, fertilizing and wait to long to mow the lawn.
The grass is not 野草 是庄稼. lawn is not natural grass land, is farm field. Did you even seen natural grass land has only one kind of grass and so tightly grow together. The lawn is very unnatural environment. If you want it to look good, you have to feed the lawn.
请问Timothy‘s， 现在补草籽是不是太晚了，是不是只能等到开春再补了？谢谢！Seeding. In last two years I tested a way of seeding. It works fine. In the end of October or early November, after all leaf were gone. I used lawn mow to cut grass very shot and collect all leaf( It is very easy, since all leaf were chipped to small pieces). I raked the lawn to expose the soil, I hand seeded lawn, rake it again try to mix the soil with seeds.( use metal rake and short and hard motion)and spread fertilizer with spreader. Snow would cover the lawn and push the seed on to the soil. Some weak seeds would die over the winter, so use little more seeds than you seed lawn in fall. In spring the seeds would germinate early, as soon as snow melt.