If my observations are right

-->> one might suggest that leaf size is genetic ... and can not vary ...

otherwise.. your post seems political ... and i suspect that is why there have to been many replies ..

ken

ps: CO2 levels are down ...

Politics aside, it has been a strange spring here, too. Very delayed, and with cloudy cool but not rainy weather. In fact we were a bit dry at times. This might have made leaves on certain plants seem a little bigger, but it's hard for me to tell because most of my plants are small and recently planted. Even on a conifer, the needles of my chinese douglas fir seem longer than last year's but that could just be because the plant is getting established.

I don't know much about C02 other then its in Coke and your brain doesn't like it.

Leaves are normal in size and growth here in Midwest.

I did notice my pines are putting on excessive amounts of candle growth this year. I will preview 3 but many more are showing unusual growth

Pinus t. 'Thunderhead' I'll leave it alone. This thing is wicked. Some day we might have to part company unless a heavy wet snow storm does it in first.

Pinus p. 'Burk's Bonsai'. 9" extensions and still growing. Not going to happen.

Pinus mugo 'Pal Maleter'. Specs at 3" a year. !0" extension and still growing. I'll candle prune this one also.

Pinus virginiana 'Driscoll' with 4" extensions. Normal 1" a year. No need for another photo.

I have no clue.

Dave

What is your precip compared to the last several years?

the precip has, no doubt, been high and constant this spring, but not unprecedented on either count.