It's Cherry time

Mature, rarely pruned cherry tree SW Denver

Yields of cherries look reasonable considering the 28 degree F lows we had on May 11 and 12. (See May 12 post on fruit bud damage). Damage at these temperatures was expected to be about 10 percent. Birds also are always a threat and can strip trees of fruit in a few days unless trees are netted.

Tart cherries are hardier than sweet cherries which often winter kill in addition to flower freezing. Sweet cherries are comparable to peaches in this respect.

Recommended tart cherries are 'Montmorency', 'Meteor' and 'Northstar'. If you want to experiment with sweet cherries, try 'Black Tartarian', 'Kansas Sweet' or 'Stella'. Tart cherries are self-fruitful while sweets need a pollinator.

'Montmorency' is the standard tart pie cherry variety that produces a July crop of bright red, firm textured fruit. It is planted in the new (second season this year) "Le Potager" food garden at Denver Botanic Gardens (see photo).

DBG 'Montmorency' cherry

'Meteor' is a very cold-hardy tree growing 12 to 15 feet tall. It develops heavy foliage that can minimize problems with birds. Fruit ripens mid to late July.

'North Star' is a dwarf tree topping out at 10 feet. It sets generally heavy crops of fruit that turn dark red for July harvest.

Note that bush cherries are very hardy and also possibilities. Nanking cherry produces some of the first flowers of spring, can grow to 6 feet and fruit is harvested in July if birds and squirrels don't find it first. Sand cherry is another bush cherry reaching 4 to 5 feet and produces mild-flavored, deep crimson fruit. Both are self-fruitful.

Photo credit: Both Carl Wilson

Time for mid-summer planting

Vacant mid-summer "real estate"

Although warm season vegetables should be coming along well by now, don't forget about what you want to do with the vacant "real estate" in your garden from previous plantings.

April/May/June harvests of cool season and quick maturing vegetable crops often leave holes in the garden. While there is no problem with leaving ground fallow, do know that if planted before mid-July, a harvest can be gained yet this season. "60 dayers" (vegetables with 60 days to harvest or less) are what to think about planting now. Surprisingly, many cool season vegetables work well. Even though planted in the heat of summer, they will mature in cooler fall weather and be of good quality.

For more specifics on what to do to make a vegetable garden more productive from mid-summer through fall, consider attending my "Follow-on vegetable gardening" class at the Denver Botanic Gardens July 12 (click here for details).

Photo credit: Bare ground from harvest of spring crops - Carl Wilson