I haven't grown 'Wirral's Pride', but my 'Becky' went from a one gallon container to a two foot wide clump in about a year. I wouldn't say it's aggressive, just expanding. If you have limited space, you'll probably need to divide every two or three years. I would divide anyway, even if space was not an issue, to replenish the soil and give the crowded center of the plant some space.

'Alaska', on the other hand, reseeds itself like crazy in my garden.

I agree with saypoint. I have 4 different seed-grown Shasta's and they are steady growers, which will reseed if you don't deadhead or collect the seed. Goldfinches help with seed control.

I divide mine every 2-3 years, to rejuvenate them and spread them around the gardens.

In addition to being beautiful plants, most of the year, they are great moisture meters. They let you know when their bed gets too dry, and respond to watering immediately.

I just planted 3 of my latest Shasta, 'Becky' from Bluestone. I have high hopes for her.

I think this has come up before on here. The term "agressive" needs to be changed! LOL There is a difference between a plant that multiplies but stays in the general area and a plant that spreads and starts popping up everywhere else.

I have a few different kinds of daisies and yes, they have spread but not that bad. I think it's just something you need to consider when you plant them. Make sure there is room to grown and either plan where you want to move more to later or find someone to take your extras. I like plants like that because they really help fill in the bare spots :)

Interesting. Over the years we've tried a couple of 'crazy daisies' and none of them did anything other than grow backwards. If this one actually *grows*, it's worth trying.

BTW, I'm not sure I've ever had a seedling from either Alaska or Snow Lady. They both spread somewhat slowly, but do increase. Becky has issues with winter. She's a good Southern lady and does not think that -15F is really suitable for intelligent life. So far she's always come back, but ....

I grow a few different Shasta Daisies, I certainly wouldn't call them aggressive, the clumps do need dividing after a couple of years, a nice plant to give a punch of white. I lost Wirral's Supreme, which I haven't been able to replace :o(, my absolute favorite.

A......

I had "Summer Snowball" which I loved. It never did multiply and finally died out. Bluestone doesn't carry it anymore. I just got "Wirral Pride' this spring.

Here in zone 4 MN Alaska seems (at least for me) to be the most reliable about returning each year. I usually divide every couple of years. Some years I lose quite a few to old man winter, but if I have several clumps in various locations usually at least some come back.