I thought I read somewhere in this forum that you should use a bagged mower when you have flowering weeds as not to spread the weeds. This would make sense but I wanted to ask to see if this information was accurate.

The benefit you get from recycling and mulching your own grass and leaving it in place far out weighs the possible negatives.
Building a thick lawn prevents weeds in the long run and mulching is a great way to "fertilize" every time you mow.
Tony M

I read your answer but it didn't answer my question so I'll try again. We you have a heavy flowering weede yard do the weeds spread if you mow without a bagged mower????

I'll give you my opinion. The bagged mower will probably capture a lot of the seed but any mower (bagged or not) will also distribute seed all over it's path. The key is in the previous messages; keep the yard healthy & the weeds (most of them) will not come back. Also, a healthy lawn will choke out the weeds that try to grow. You will notice this later in the growing season when the grass is growing rapidly.

Thank you KHOZ for your answer. Simple and to the point. That's all I needed.

Just because someone's answer isn't worded the way you want does not make it less of an answer. There are 2 sides to this coin and Tony was trying to explain the negatives and positives of the situation as it is NOT black and white which is how you seem to want it. You will find in organics, that it is not always black and white.

Jazzy,
The correct answer to you inquiry is: NO
As I have learned over many years of answering questions that way, most (and I mean most) people don't like that type of answer at all. I have received more than my share of "you smart a.." and a few have taken it futher than that.
But I am good at answering the question ask. So any thing else you want to know about gardening just ask me.