QUESTION: My mistake but this second year I have gone and planted runner beans
too early, inside in toilet rolls, somehow I got the timings mixed up and went into overdrive early this month.
They now range between 12 and 24 inches, but it is a still a way off last predicted frost date, I now realise, last week of April for this area, south east. Is there anything I can do to slow them down, e.g. water them less, keep them in the shade, add more compost to containers, or should I re pot them? There are 17 of them in this batch. I also pushed the toilet rolls well into the containers, so not masses of compost below them for roots to grow, though not that many roots showing yet.
And, this morning there was some white looking mould on the top of the compost (basic stuff from garden centre)/on the toilet rolls…..could this be:
over watering,
or some kind of infection,
or because I’ve moved them off the sunny windowsill and missing direct sun…
The bean leaves look healthy as far as I can tell, I have attached photo which hopefully shows this white stuff!
With thanks for any steer you can offer.
ANSWER: Unfortunately there is very little you can do now to slow them down without damaging
them.
My advice would be to plant them when the roots start to show at the base of the toilet rolls, who knows, this
year there may not be a late frost in which case you will be ahead of schedule at no cost. I would also sow a few
more seeds now just to be sure. Alternatively you can repot them to extend their life in pots by 10 days or so.
The white mould is just that, mould. It’s caused by a combination of lack of air flow and high moisture. In all
likelihood it won’t cause problems. You might want to place the plants outside when the temperatures are +10.
This will give some air circulation and at the same time harden them off slightly.
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COMMENTS / QUESTIONS LEFT BY OUR READERS
This has happened several times in my raised bed and also in separate pots, what is going on?
ANSWER: What’s happening is that as the roots begin to sprout they are unable initially to
push down through the compost. They therefore push the seed upwards.
You can try three things. First plant the seeds slightly deeper. Also, when you fill the pot with compost
don’t firm it down. Simply tap the base of the pot on a table to settle the compost slightly. The final thing
you can try is to only half or third fill the pot with compost, then place the seed on the compost. Place more
compost over the seed to the correct depth.
ANSWER: It’s far too early to sow runner beans for next year. Think more along the lines of April next year.
Store the seeds in a paper envelope in dark, dry and cool conditions until then.
ANSWER: If the seeds haven’t germinated in a month and they have what looks like mould then almost certainly
I would throw them away and start again. Make sure the new ones are kept warm and slightly damp but not
water-logged.
ANSWER: What you describe are pollen beetles, they are common on many veg and plants. You often notice them when you hang out washing in your garden – they appear from nowhere. They feed on the pollen from the flowers and do no damage at all, just ignore them.
too early, inside in toilet rolls, somehow I got the timings mixed up and went into overdrive early this month.
They now range between 12 and 24 inches, but it is a still a way off last predicted frost date, I now realise, last week of April for this area, south east. Is there anything I can do to slow them down, e.g. water them less, keep them in the shade, add more compost to containers, or should I re pot them? There are 17 of them in this batch. I also pushed the toilet rolls well into the containers, so not masses of compost below them for roots to grow, though not that many roots showing yet.
And, this morning there was some white looking mould on the top of the compost (basic stuff from garden centre)/on the toilet rolls…..could this be:
over watering,
or some kind of infection,
or because I’ve moved them off the sunny windowsill and missing direct sun…
The bean leaves look healthy as far as I can tell, I have attached photo which hopefully shows this white stuff!
With thanks for any steer you can offer.
ANSWER: Unfortunately there is very little you can do now to slow them down without damaging
them.
My advice would be to plant them when the roots start to show at the base of the toilet rolls, who knows, this
year there may not be a late frost in which case you will be ahead of schedule at no cost. I would also sow a few
more seeds now just to be sure. Alternatively you can repot them to extend their life in pots by 10 days or so.
The white mould is just that, mould. It’s caused by a combination of lack of air flow and high moisture. In all
likelihood it won’t cause problems. You might want to place the plants outside when the temperatures are +10.
This will give some air circulation and at the same time harden them off slightly.
ANSWER: Nip them out 15cm from the top. If you leave them to continue growing you will end up with a congested mass of foliage at the top which produces very few beans.
ANSWER: Normally runner beans continue to crop well into September, depending on where you live in the UK.
I take mine down when they stop cropping and put them on the compost heap. As far as I can see there is no advantage to leaving them in the ground over winter.
On a practical note, their tendrils quickly become very hard to remove from netting (or whatever you use to support them) if they remain after they stop cropping.
But there is probably no other good reason to remove them before next year.
and the pods fail to develop. Anyone else had this problem?
ANSWER: No, just put them in the compost any way. If you want to go overboard, the shoot will appear from the little, normally white, indentation in the seed. Planting this upwards will enable the shoot to reach the surface about a half day earlier compared to the indentation being placed downwards in the soil. But that’s about it.
ANSWER: Just stack them side by side as you suggest.
ANSWER: The normal reason for lack of flowers, or late flowers is too much nitrogen in the soil. Nitrogen encourages leafy growth often at the expense of flowering. Possibly you added some nitrogen rich ertiliser at the beginning of the season which is only running out now. Next year, try only feeding with blood, fish and bone and lots of watering.
ANSWER: Personally I would only sow runner bean seeds in individual pots. if you sow lots of seeds in trays the plants will quickly have entangled roots. Runner beans produce roots very quickly after germination. If I was sowing them in wooden crates or any other large container I would keep them as far apart as possible.
ANSWER: The two key reasons for lack of pods on runner beans are that they are not being pollinated or that the pods are falling off at a very early stage, unnoticed. I assume your Hestia is growing in a pot so it seems unlikely that fallen pods have gone unnoticed so that leaves a problem with pollination.
I don’t know for certain the answer but i suspect that it has to do with living in a second floor flat. Bumble bees have been spotted flying at altitudes higher than Mount Everest but the suspicion is those particular types of bumble bees had evolved to do just that. Research is still going on as how high your average bee can fly.
But irrespective of their high flying capabilities it may well turn out that in practice some types never
bother to fly above a certain height because the likelihood of finding food there is so poor compared to lower heights. It’s just possible that the particular bees which are good at pollinating runner beans just can’t be
bothered.
This would explain the presence of some bees. The only way to prove it is to hand-pollinate your Hestia and see what happens. I leave it up to you to investigate hand pollination of beans on the internet.
ANSWER: Yes, that will be fine. By nature, runner beans produce excessive foliage because they are climbers and they are programmed to survive low light levels. I have a sneaking suspicion that removing some of the foliage will in fact increase the crop of beans. I just haven’t had time to test the theory out.
ANSWER: Yes, it does help them. Firstly they start to produce beans earlier if you pinch out the tops. It also stops the top of the supports from becoming congested with overgrown foliage – that can attract fungal diseases. Finally it stops the top part of the plants becoming so heavy that they pull themselves off the supports. I usually pinch my runner beans out when they get to 15cm / 6in from the top of the supports.
ANSWER: It won’t do any harm but I doubt it will do much good either. If you have trenched with manure all the necessary nutrients will be there. I think the problem is more likely to be the variable weather this year in some areas of the UK rather than lack of nutrients.
ANSWER: It does sound like the plants have suffered from the cold weather. As a solution I would compromise. First, leave the existing runner bean plants where they are, if they have new growth they may well recover. As a backup I would sow new seeds now in pots and keep them indoors to speed up germination. If you soak the seeds by placing them on damp kitchen paper for 24 hours before sowing them in pots that will speed up the process even more.
Your seeds will have germinated in a week and be ready for planting outside in two weeks. At that point you can look at your existing plants and decide if you want to replace them with the new seedlings.
ANSWER: The key to your question is how rich in nitrogen is well rotted horse manure and how this will affect runner beans? Well rotted horse manure does contain a reasonable amount of nitrogen but not quite as much as many believe. It also only releases the nitrogen slowly and over about a three to four year period. Roughly speaking, 50% will be released over year 1, 25% over year 2, the rest at 12% a year. The key is that it is slow release so is very unlikely do anything other than good for runner beans.
The key variables are how much bedding is included in the mix and what the horses diet was. Well rotted horse manure provides a wide range of other nutrients and will greatly improve the texture and make-up of almost all soils.
I would add
about a 5cm to 7cm layer around the base of the plants each year and it will do nothing but good for runner beans. Dig it in when you dig up your beans at the end of the year.
ANSWER: I timed this on my runner beans and it took about two weeks for small but obvious beans to appear.
ANSWER: Never heard of that before! But if they are indeed runner bean shoots then they should produce excellent plants.
ANSWER: If the runner beans will be planted outside in the next week then leave
the flowers on. Sometimes premature flowering is a sign that the plant is under stress possibly because the pot is too small. In this case, pot them up into a larger pot.
ANSWER: Runner Bean seeds germinate quickly so it seems likely that there is a problem if they haven't appeared after two weeks, however give them another week just to be sure.
Common reasons could be that they don't have enough heat, they should be very roughly at house temperature for good germination.
Another common problem is that the seeds have rotted because the compost is too wet. Use moist compost but not water-logged.
The seeds could simply be bad, that's always possible, or simply too old. When stored correctly in dark, cool and dry conditions runner bean seeds will keep well for three years.
ANSWER: I think that overwatering is the most likely cause. Now they are planted in the open ground they should recover. Don't water unless conditions are very dry, let the roots search out water for themselves.
ANSWER: This sounds like halo blight, see the section above. If you reply to this email and attach a picture or two of the damage I will be able diagnose the problem more
definitely.
ANSWER: The prime culprits for eating the leaves (especially the young tender ones) of runner beans are slugs and snails. See the section above here. Other causes can be pigeons, rabbits, deer and as you mention some caterpillars.
ANSWER: As far as spraying the runner beans and then eating them is concerned you need to be clear that you have followed exactly the instructions on the spray. If that has been done the manufacturers of the spray believe that the veg will be safe to eat. Only you can decide if that is true
The runner beans themselves look mis-shapen to me, at first I thought they were broad beans. I think you may find that the skins are rather tough and the beans inside over grown.
ANSWER: I think a photo is needed to identify this problem.Click here to email us and attach a photo of the affected leaves.