Blueberry, Skunkberry, Graddaddy Purple, Purple Urkle - growing speed?

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Greetings and salutations!

My next grow I'm running Blueberry, Skunkberry, Granddaddy Purple, and Purple Urkle. I understand that GDP and PU are slow growing low bushy type of plants, I Want to end my 4 strains about the same height. I'll be topping 3 times for 8 colas per plant, I figure that's going to take some time for GDP and PU.

Question: How much time ahead should I germinate GDP and PU so they all finish about 14" at the end of veg, the same time as BB and SB hit that height.

thanks!

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I'm looking for people who've grown one of the above strains, I'd like to hear how the strain grows compared with other's you've run.

Thanks

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Hobbes said:

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I'm looking for people who've grown one of the above strains, I'd like to hear how the strain grows compared with other's you've run.

Thanks

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You’d probably want to plant those Purples at least four weeks ahead of the others, maybe even six.
GDP has very little stretch in flower, and is slow in veg, too.
Urkle should have a little more stretch to it.
Where as the Blueberry, and Skunkberry, should at least double in height during flower, if not more.

Thanks Bad Karma, just what I needed to know!

Hobbes said:

Thanks Bad Karma, just what I needed to know!

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You’re welcome, sir.