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planting mirabilis jalapa tubers

SwedboySwedboy Posts: 386
Could anyone give me some advice on how to plant them. Bought 5 at Schiphol last night as I always wanted to grow them. The bag doesn't give any instructions bar plant April/May. They are currently in the fridge awaiting your advice.


  • BookertooBookertoo Posts: 1,306

    I have grown them in the past in a large pot  (but then, I grow nearly everything n pots so that doesn't say much really!), I used a mixture of JI2 and general purpose compost, gave them a reasonaby sheltered spot, they do come from the tropics, and they flowered fine for me.  If you did chose to do them in a pot, you may be able to keep them over for a second year, but I did not take mine inside so they did not survive.  Lots of very pretty papery petalled flowers, varied colours - nice. 

  • SwedboySwedboy Posts: 386
    How deep do you need to plant the tubers?

    I'll probably plant some in pots and the rest in the border using normal compost with s bit of added grit.

    I thought you could overwinter them as dahlias?
  • nutcutletnutcutlet Posts: 27,157

    I've never kept the tubers, they're so quick and easy from seed and produce plenty of seeds so I keep them going like that. Less trouble to store seeds than tubers. Sorry Swedboy, not answered your question on when to plant. I'd get them planted, if a frost is forecast you can always cover them with some newspaper, there won't be a long penetrating frost now.

    In the sticks near Peterborough
  • I have just bought a packet 3 tubers of mirabilis  perenials please can you advise which way up do i pant them they'r still in bag but look cigar shape. am new to gardenig.

  • Mark 499Mark 499 Posts: 380

    I bought a pack from Poundland last month, I planted them into pots & placed into the conservatory so far 2 of them have new shoots appearing.As for which way up to plant ,I found that 1 end was more rounded than the other so I kept the rounded end up.

  • nutcutletnutcutlet Posts: 27,157

    I agree Mike, the seed started ones are very quick indeed, large, easy to prick out seedlings and no messing about looking after tubers through the winter.

    Never has aphid trouble though

    In the sticks near Peterborough
  • SwedboySwedboy Posts: 386

    Saved some seeds from last year so I better get sowing. Slightly disapointed that mine didn't smell much. That was my reason for buying them. 

    Dug one tuber up and left the others behind. Suspect they have drowned now...

  • nutcutletnutcutlet Posts: 27,157

    Plenty of time to sow, I do mine about now. Except that I forgot to save any last year.

    Thebest scent is in the evening as with many plants.

    In the sticks near Peterborough
  • I sowed my mirabilis and they broke the soil in two days they have got to be one of the quickest to germinate I've sown. Does any one know any other plants that germinate fast?

  • SwedboySwedboy Posts: 386

    When can you expect the tubers to spring back to life again. The ones I had seems to have survived winter well have been back in the soil two weeks or so but no life from them. I am probably a bit impatient as I am eyeing up the pots for something else if they don't come back to life soon.

    (had a littel dig about and the tuber looked fine but no growth.)

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