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BobTheGardener


Latest posts by BobTheGardener

Dahlias

Posted: 13/06/2012 at 00:26

If it is insect damage ike leaf miners or cutworms/caterpillars and you are not averse to non-organic controls, give them a spray with a systemic insecticide which will be absorbed and spread throughout the plants.  Provado ultimate bug killer is a good one.  Systemics are the only things that will work against miners, which eat the leaves from the inside, so contact insecticides are useless againt those.

BUGS

Posted: 12/06/2012 at 23:51

Those lily beetles were mating, so you now need to check beneath every leaf for the eggs.  Luckily, the eggs are also bright red so easily spotted!  If you let them hatch, you'll soon find little brown gooey blobs appearing (the larvae, which live inside their own excrement - yuck!) and can devastate lily plants in very short order.  Squash on sight!

Dahlias

Posted: 12/06/2012 at 23:40

Delphiniums and dahlias are probably slugs and snails favourite snacks, so double-check for them.  They don't always leave obvious trails.  When you say the holes are like the wings of a lacewing, do you mean the structure is intact, but the green material between the veins is being eaten?  If so, it could be a sever leaf miner attack.  A photo would really help.

Whitefly

Posted: 12/06/2012 at 19:13

There's also a tiny wasp predator called Encarsia Formosa which you can buy.  The problem with using predators like these is the cost (they don't come cheap) and there is always a minimum temperature you need to maintain, which is rather tricky in an unheated greenhouse at the moment if you are in the UK!

Clematis from seed?

Posted: 11/06/2012 at 22:50

I must admit to never trying alpinas from seed, Alina.  Must give those a go - I have Frances Rivis which I think has some seed heads on at the moment, so looks like a new project!

Securing Greenhouse Base to Paving Stone Base

Posted: 11/06/2012 at 22:30

Is this on existing paving?  If so, you can drill holes in the slabs using a masonry drill and use rawlbolts to fix galvanised 90 degree angle brackets in the corners, then drill through the base sides and secure to the brackets with stainless steel bolts.  Screwfix are a good place to look for things like that.  If you are also putting down the paving at the same time, you can concrete in the angle brackets when you lay it. 

Clematis from seed?

Posted: 11/06/2012 at 22:18

I've successfully grown Clematis integrifolia and mandschurica (both herbaceous types) from seed which was quite easy, particularly integrifolia, which I've grown from seed made by my existing plants. Large flowered varieties are a different matter though as they tend not to produce many viable seeds and are harder to germinate as well as not coming true to type from seed.  Those take several years to mature to the flowering stage.  Commercially, all large flowered types are propagated from cuttings. However, there is always a chance of developing a new variety if you have the patience!

Cucumber stem rot ?

Posted: 11/06/2012 at 18:55

If it has a localised fungal infection which hasn't spread to the rest of the plant, it will die above the rotting section anyway, so I would cut it off about 6 inches below the wound, just above a leaf joint.  What you don't want is for the fungus to set fruit (which will be hair-like and almost invisible) as they will release spores into the air which may infect other cucumber plants.  If the rest of the plant is uninfected, it should produce side shoots from some of the junctions between the leaves lower down and the stem.  Select the strongest of these as your new main stem and it may grow OK from there.  Good luck!

Talkback: How to plant a grapevine

Posted: 11/06/2012 at 18:28

Hi sallyannie,

Where are you located?  In the majority of the UK, grape vines are fully hardy so you don't have to worry about Winter protection.

What's the weather like in your area?

Posted: 10/06/2012 at 14:55

Lovely day here so far, with sun and passing clouds.  After all of the rain lately, I'm sure I can actually hear things growing!  Unfortunately, serious amounts of the wet stuff forecast for tomorrow though, so planting out the last of the sprouts today - at least they'll get a good watering in tomorrow!

Discussions started by BobTheGardener

Watering dried-out pots

Tip to help to stop water running straight through 
Replies: 13    Views: 229
Last Post: 28/07/2014 at 12:28

Blackfly - ladybirds to the rescue!

Broad bean tip blackfly infestation 
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Last Post: 13/07/2014 at 18:04

Bob's guide to picking soft fruit

Only fto be read by your household's main gardener! 
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Lovely surprise

I went down the garden in the gloom.. 
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Dragonfly/Darter/Mayfly ID?

Flew into the polytunnel for a while 
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Last Post: 01/06/2014 at 21:44

A week of rain = jungle garden!

It's been too wet to really do anything outside.. 
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Last Post: 01/06/2014 at 17:42

Deep Down & Dirty: The Science of soil

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Last Post: 24/04/2014 at 11:30

Check your delphiniums for caterpillars

Look for distorted and damaged leaves near the tips 
Replies: 10    Views: 341
Last Post: 22/04/2014 at 10:58

Seed grown Wisteria finally in flower - Hooray!

Planted many years ago 
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Last Post: 15/04/2014 at 12:39

Oops!

Polytunnel growing 
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Last Post: 16/04/2014 at 19:05

First day of (meteorological) Spring

How id your garden looking 
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Last Post: 03/03/2014 at 20:31

DIY heated propagator

Making one from scratch 
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Last Post: 30/06/2014 at 19:57

Cost of bird food

bulk vs supermarket 
Replies: 31    Views: 1297
Last Post: 10/02/2014 at 12:33

Wild Garden (Community Channel)

On Freeview/Sky 
Replies: 5    Views: 430
Last Post: 10/12/2013 at 12:21

Front garden revamp - before and after photos

Redsigning weedy crazy paving 
Replies: 24    Views: 1567
Last Post: 21/10/2013 at 20:16
1 to 15 of 23 threads