Answer: Hostas grow best in soil that is enriched with organic matter such as compost and that is evenly moist yet well drained. This means damp like a wrung out sponge, not sopping wet and not dried out. If the soil is dry they will be slow. New plants usually take a season to become established and then grow better after that. Using an organic mulch can help keep the soil more evenly moist and will also help feed the soil as it breaks down over time. Hostas can be top dressed with compost in spring and early summer and can be fertilized with a general purpose granular fertilizer or a slow release granular fertilizer with an analysis of 10-10-10. Read and follow the label directions for how much to use. Finally, I should mention that hostas planted in the midst of tree roots may grow slowly due to the competition from the roots. Also, certain varieties are naturally slower than others growers. Many of the "blue" hostas seem to be slow growing by nature. I hope this helps.
Q&A Library Searching Tips