396 useful answers · Page 8 of 17

Gardening: page 8

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Should the thick rhizome of a bearded iris be covered with soil?

Keep the roots buried while leaving the main rhizome exposed at the surface, as recommended by Maryland Extension. Deep burial and mulch piled over the rhizome encourage trouble. Choose a sunny, well-drained location and settle soil around the roots. Do not apply this bearded-iris planting rule automatically to other iris species with different moisture and planting requirements.

How do I know which pruning group my clematis belongs to?

Look up the cultivar name first. Early spring bloomers generally flower on older growth; early large-flowered types often need light pruning, while later-flowering group-three plants bloom on new growth. If the name is unknown, observe when and where it flowers before cutting hard. Removing all old stems indiscriminately can remove the coming season’s flower buds.

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What can I plant near bleeding heart to cover its summer gap?

Use neighboring plants that grow into the visual gap after old-fashioned bleeding heart becomes dormant. Ferns, hostas, astilbes and suitable hardy geraniums can work in compatible shade and moisture conditions. Allow room for both plants at their mature sizes. Keep track of the bleeding-heart crown so adding a companion does not mean cutting through the dormant roots.

Why have my astrantia seeds not germinated in a warm room?

Astrantia seed benefits from a cold, moist period before germination. Wisconsin Extension describes roughly two to three months of stratification, with fresh seed preferable. Follow the seed supplier’s instructions for your variety rather than repeatedly moving dry seed to a warmer shelf. Dividing an established plant is another option when you want to preserve a named cultivar.

Should I divide an astilbe or grow its seeds to get the same flower color?

Divide the existing clump if preserving a named variety’s color and characteristics matters. Seedlings may differ from their parent and can take several years to flower. Spring division is a practical approach for established clumps. Replant healthy divisions into suitable moist soil and water them in, rather than leaving exposed roots to dry while preparing the new bed.

Source checks for these answers: September 22, 2026. Product instructions and local requirements can vary.