Sylvain in Montreal, QC., asks:
I planted cuttings of my variegated pothos that had been rooted in water. That was over a year ago and they have not grown a centimetre. They live in the same conditions as their parent plants. I feed them with Acadie Seaweed (0.3-0.3-4) that works well for all my houseplants. I’m puzzled.
Judith Adam, horticultural consultant for Garden Making, says:
Yes, you should have some new growth by now. The fertilizer you’re using is higher in potassium (the third number), and that element isn’t the most useful for encouraging new roots and shoots. It might help to temporarily switch to a fertilizer with more nitrogen and phosphorous (the first and second numbers in the nutrient analysis), such as 9-14-8. That is considerably higher than your usual fertilizer, but one or two feedings might stimulate the pathos to begin growth, and then you could switch back to the usual fertilizer with lower numbers.