Last year, I got several tree peony seeds from a friend. According to the instructions got from the web, I planted those seeds in sand, after roots show, soaked in GA3 solution to make it sprout, and re-planted in sand.After two months, nearly all of those seeds sprout, it is really exciting. So far so great.Then I met the problem.

In the first several days, those seedlings grew very fast. Some of them were even 15-20cm higher after half a mounth,nearly twice as high as normal tree peony seedlings in the first year.Anyway, it is acceptable if the leafs spread normally. But nearly all of those seedlings faild in this. Below are several pictures.

Firt one:

One month after sprout.15 cm high.

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Same one,two months after sprout.18cm high,the leaf is 2-3 cm long.

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Another one:

20 days after sprout, 9 cm high.

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two months after sprout, 10 cm high, something wrong with the leaf.

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At the same time, the second leaf bud at the axil of the first leaf.very small, 3mm.

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The other seedlings look alike, most of them have the same problem of leaf spreading.I am wondering if someone could give me some advice on these?

Now, it is still winter here, outside temperature is below freezing point. These seedlings are put in the warm enclosed balcony, the temperature is about 15 Celsius degree, with humidity of 60%. The illumination is not very good, but it is okay.

Some one said the leaf problem might come from high temperature. Before I moved this seedling to balcony,they are in the room and the temperature was 22 Celsius degree. So I moved them to the balcony, cooler than the room.

Some one said, it might be the illumination. Then,I bought a 65W energy-saving lamp to supply supplementary lighting 5 hours per day.

or it might two much fertilizer in the soil?

I don't know, 1 months after these changes, it seems nothing changed. Can anyone help?