m******6
发帖数: 6262 | | S*A
发帖数: 7142 | 2 加州就不是。
最近下过雨，好多杂草都发芽了。
【在 m******6 的大作中提到】
: 杂草都死了？
| m******6
发帖数: 6262 | 3 加州 no winter, i m in NJ.
【在 S*A 的大作中提到】
: 加州就不是。
: 最近下过雨，好多杂草都发芽了。
| y*****8
发帖数: 18140 | 4 持怀疑态度
杂草往往比好草生命力顽强，绿得多。
杂草都死了？
【在 m******6 的大作中提到】
: 杂草都死了？
| m******6
发帖数: 6262 | 5 but it is winter.
【在 y*****8 的大作中提到】
: 持怀疑态度
: 杂草往往比好草生命力顽强，绿得多。
:
: 杂草都死了？
| h******e
发帖数: 3949 | 6 不管好草坏草，冬天还绿就是好草
【在 m******6 的大作中提到】
: 杂草都死了？
| f*1
发帖数: 837 | 7 The answer to your question is a definite no.
Roughly speaking, weeds could be grassy or broadleaf, summer annual or
winter annual or perennial (let's just ignore biennials for simplicity
purpose). So there is 6 combinations.
Winter annuals generally germinate in the fall, green through the winter,
set seeds in the spring and die in the summer. A recent post showed
pictures of bittercress and shepherd's purse, which are both broadleaf
winter annuals:
http://www.mitbbs.com/article_t/gardening/31901443.html
Some types of Poa Annua (Annual Bluegrass) are grassy winter annuals, so
they could be green in the winter too.
Crabgrass is a grassy summer annual, so it does die off in the winter if it
is cold enough (not so in warm winter areas).
And don't forget grassy or broadleaf perennials, which would grow back next
spring even if they become brown in the winter, because they are perennials
(and some may just keep being green in the winter). Some examples in these
categories are nimblewill, yellow nutsedge, dandelions, broadleaf plantain,
ground ivy, and white clover.
A good NJ weeds gallery page:
http://njaes.rutgers.edu/weeds/thumbnail.asp | s*********e
发帖数: 5245 | 8 不是。冻死的只有ANNUAL WEED（不过种子可能都进地里了，明年再爆发）。PERENNIAL
还在。
【在 m******6 的大作中提到】
: 杂草都死了？
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