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Agastache Blue Boa and Salvia Amistad - too small to divide?

NollieNollie Posts: 7,056
They are only a year in the ground, but growing away nicely.  I was wondering if it were feasible, in the spirit of make do and mend (mail order plants not being a possibility just now, due to courier overload). Maybe just the biggest of each group?

Mountainous Northern Catalunya, Spain. Hot summers, cold winters.


  • ButtercupdaysButtercupdays Posts: 4,409
    I don't know about the Agastache, but Amistad is very easy to root from cuttings, either in water or in a small pot of compost and it grows fast, so soon makes a decent sized plant. It is one of my absolute favourite, reliable plants and I make sure to always have one or two spares in reserve.
  • NollieNollie Posts: 7,056
    Thanks @Buttercupdays. I actually have several cuttings of each in water, three weeks now and no sign of roots. They are still alive, but maybe it is just too early? I have no potting compost, grit or such and can’t get any at the moment, with all the GCs shut!
    Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
  • NollieNollie Posts: 7,056
    Hi folks,
    Can anyone advise me whether it’s OK to split the bigger of these one-year old perennials?

    Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
  • lilysillylilysilly Posts: 511
    Hi @Nollie, l wouldn't try and divide the salvia Amistad . Mine is just putting on growth at the base, growing from a central woody stem. I would not want to risk losing the plant, via the core rotting off if l had tried to cut it in half. My plant has no natural division point. I would just separate your group of 3 established plants, and plant elsewhere. They are all of a good size now and in good soil would soon grow away to a sizable plant, filling the space of your clump in a matter of weeks.
    In a few weeks when they have settled I would take cuttings of the Amistad. Strong side shoots pulled away with a tiny heal. I just use a small square plastic pot, poking one cutting in each corner in a gritty soil. On a bright, but not full sun windowsill they root within a fortnight with a near 100% success rate. They grow fast, and with a bit of pinching out  and potting on are soon in 1 litre pots ready to go in the garden. 
    Sorry I don't have experience of agastache.
  • I wouldnt divide the agastache they dont like it! In my very limited experience they dont like being split or being cold and wet .I lift mine that I have in the ground and put them in pots over wintering them in a mini greenhouse.then put them back in the garden in spring.
  • NollieNollie Posts: 7,056
    Hi, @lilysilly and @the tidy gardener,

    Thanks for your replies. I have no problem leaving them in the ground here (different climate and roughly a month ahead of the UK) but from what you are both saying it is inadvisable to divide them so I will leave them be, as I like things in groups of three.

    I have loads of salvia caradonna that will divide easily, but of course I don’t want more of that one, I want more of these ones!! 

    I will try again with some root cuttings in water, since the last ones failed totally. 

    Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
  • I agree that Salvias are easy from cuttings but I woud not root either these or Agastache in water but instead use a gritty compost or Perlite as they both appreciate good drainage and tend to rot off in water.  Agastache will grow from cuttings but need a bit more care.  I have rooted Blue Fortune in grit but there are always more failures than with Salvias, and they do root better as semi-ripe cuttings taken in mid to late summer.  I leave mine in the ground with a mulch over the winter and they mostly survive outside here in the East Midlands on a free-draining soil.
  • NollieNollie Posts: 7,056
    Thanks @parrotfeather* I would use a gritty compost/perlite/grit, but I don’t have any and no chance of getting any for the foreseeable future. You are right, they do rot in water, as my sad specimens prove! I wondered if I was just being a bit too keen/early, even for here. Will try again later in the year. 
    Mountainous Northern Catalunya, Spain. Hot summers, cold winters.
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