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Old 28-08-2013, 03:16 PM posted to uk.rec.gardening
Timothy Murphy[_2_] Timothy Murphy[_2_] is offline
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First recorded activity by GardenBanter: Apr 2012
Posts: 14
Default Non-flowering wisteria

Charlie Pridham wrote:

Anyone got a secret cure for non-flowering wisteria?
I've tried strict pruning for 4 years.


I ought to confess that the garden is in Italy (Tuscany)


If they are growing well you can rule out lack of water which is a common
reason for them to be slow to get away here in the UK.


Thanks for your response.
I have a Hozelock daily watering system,
so if anything they would be getting too much water -
but I don't think they are.

Were they clones i.e. cuttings or grafts? or seedlings? both will flower
but seedlings generally take a lot longer, but in both cases they need a
good woody framework before they settle down to flower well.


They were bought from a very good local garden centre as 5ft high plants.
I looked to see if they are grafts, and I think they probably are
as there is a slight bump near the soil.
They now have thick wooden stems, and are in fact exceptionally healthy
except that they don't have flowers.
Somebody suggested superphosphate, which I shall try if I can find it.

Summer pruning can help certainly. but I have never pruned my 30 year old
plant which flowers prolifically ever year, but I do let it go horizontal
and hang down, both of which does the same as summer pruning and makes the
Wisteria think it has reached the top of its tall tree!


The wisteria plants are largely horizontal,
going over a couple of pergola/arches.


--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin 2, Ireland