Posted: 13/02/2014 at 18:52
Hi Ally, yes, but she should use a glyphosate-based weedkiller then leave them alone (ie do not remove any leaves, even when they go yellow.) As the leaves die back, the glyphosate will be taken into the bulb and kill it. She may have to repeat this for a few years as previously shed seed will still germinate and new bulbs will form. Resolva is good stuff but it does kill the top growth off very fast, probably too quickly for much of it to be taken down into the bulb.