Asimina

[mayz]

I grow an Asimina (6 years old seedling). This spring I have partially grafted it with cv Davis.

But this shrub blossoms very late (end of may) so I think that it is not well adapted to my climate.

What is the flowering time in US?

Attachments:

[edwin]

Looking it up - It's a Paw Paw!

We have 4 of them - two started from seed last year and two started 2 years ago from nursery stock. It is not native to our area, though it is hardy in our zone (or so I think).


I don't think that is going to help you though.

This might be of interest to you - see especially table 3

www.pawpaw.kysu.edu/ppf/Pomper%20et%20al.%2062%283%29.pdf

[mayz]

So my pawpaw blossoms one month later.

the ripening of fruit needs nearly 140 days

end may + 140 days ripening mid october

so the ripening remains possible as the first frost comes between end october and end november

[MikeH]

Jul 5, 2012 9:49:43 GMT -5 edwin said:

We have 4 of them - two started from seed last year and two started 2 years ago from nursery stock. It is not native to our area, though it is hardy in our zone (or so I think).

When you say nursery stock, do you mean a grafted cultivar? How large are they? I've got NC-1 and Sunflower although they're probably too young to produce much scion wood. I've also got 6 started from seed with another 5 seeds looking like they will sprout as well. It'll be a while before they'll be ready to take grafts

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[mayz]

Asimina takes graft easily so graft the earliest that's the best.
After 2 growing seasons your plants will be ready for the grafting.

Don't make my error. Now my pawpaw is shrub and the grafting is not easy.

[MikeH]

Jul 20, 2012 1:49:38 GMT -5 mayz said:

Asimina takes graft easily so graft the earliest that's the best.
After 2 growing seasons your plants will be ready for the grafting.

Don't make my error. Now my pawpaw is shrub and the grafting is not easy.

Thanks for the time indication. I figure that when they reach a caliper of 3/8 to 1/2 inch I'll graft. I'm hoping to to beg if I can't swap scion wood - www.nutgrowing.org/scion.htm

[khoomeizhi]

i was under the impression that pawpaw needed to be kept in mostly shade for the first 6 years (but then would fruit better in full sun thereafter)...does grafting at 2 years change that? anyone know?

[MikeH]

Although the pawpaw is capable of fruiting in the shade, optimum yields are obtained in open exposure, with some protection from wind (on account of the large leaves). Germinating seedlings, however, will not survive under those conditions because they are extremely sensitive to full sunlight, which can kill them. (Containerized seedlings may be grown without shade in a greenhouse.) Shading for the first year, and sometimes the second, is normally required outside, and it is for this reason that pawpaws are almost always found in nature as an understory tree. The soil should be slightly acid (pH 5.5-7), deep, fertile, and well-drained. Good drainage is essential to success. Pawpaws will not thrive in heavy soil or waterlogged soil. In habit it is a small tree, seldom taller than 25 feet. Grown in full sun, the pawpaw tree develops a narrowly pyramidal shape with dense, drooping foliage down to the ground level. In the shade it has a more open branching habit with few lower limbs and horizontally held leaves.

WIth the long taproot, they probably don't transplant well so I'll be planting where I want them. Looks like I'll be constructing some kind of a shade shelter to protect them for the first few years.

[khoomeizhi]

hmm. wonder where i got that 6 years figure from. the first couple seed-grown ones of mine are now in their third year, in gallon-ish pots, sitting in the shade.

guess i'll seek scion wood for improved cultivars this winter.

[MikeH]

Jul 20, 2012 18:38:40 GMT -5 khoomeizhi said:

hmm. wonder where i got that 6 years figure from. the first couple seed-grown ones of mine are now in their third year, in gallon-ish pots, sitting in the shade.

guess i'll seek scion wood for improved cultivars this winter.

www.nuttreesnorth.com/
www.petersonpawpaws.com/

Cultivars and sources - www.pawpaw.kysu.edu/pawpaw/cvsrc98.htm#B