Its growth should be similiar in size to a Nikko. It will not attain mature size for some years, like 6 more years. It needs to develop a more extensive root system and that takes some years.

Thanks, I'll be more patient.

Joy, I planted my ES about 3 years ago. They were in 2 gallon pots when I bought them. I am in Zone 5 too and they seem to die back a bit every winter. Anyway, 2 years ago, they grew a bit and bloomed well. Last year, the plants exploded and grew like crazy! However, there were very few blooms (probably all got damaged by the late frost). This year, we had late frost and late snowstorm again. They killed off many tender leaves, but miraculously, the flower buds did well and now the plants are full of buds!

In answer to your question, they did get big! The tallest one is about 4-5 foot tall now! So, they do get big, even in our climate. I guess you do need to be more patient... I did not apply much fertilizer except for Holly Tone last year. However, during the first couple of years, I really wanted to develop a strong root system so I watered them deeply almost every day. It did seem to help.

Good luck!

I'm in zone 5,around Chicago. My ES have been in 3 years. This year they're fuller but I have yet to see buds. Mine get only afternoon sun though. The southern part of zone 5 might have better luck. Don't know.

See ES link below, you might find it helpful...

For the most part, mine die back. They grow back vigorously to about hip height. They have become bushier with age. Very nice in terms of foliage. Bloom are another story (see link)...

Here is a link that might be useful: Other ES thread